Sean Whitton <spwhitton@HIDDEN>
to control <at> debbugs.gnu.org.
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Tue, 4 Aug 2026 08:51:44 -0400 (EDT) Received: by melete.silentflame.com (Postfix, from userid 1000) id AD9717E6329; Tue, 04 Aug 2026 13:51:43 +0100 (BST) From: Sean Whitton <spwhitton@HIDDEN> To: Dmitry Gutov <dmitry@HIDDEN>, Markus Triska <triska@HIDDEN>, martin rudalics <rudalics@HIDDEN> Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed In-Reply-To: <7b3a8ca0-60a6-4935-83b6-912f15812e19@HIDDEN> References: <87jysz2z65.fsf@HIDDEN> <20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> <87a4tu79eo.fsf@HIDDEN> <9ab986f0-ddf5-42b7-849a-1049e65bba37@HIDDEN> <32316728-9d49-4fc0-8f0a-f9b5c42fd1a5@HIDDEN> <86v7ciyphr.fsf@HIDDEN> <5a098971-57bd-40ac-b3ca-29f03ed0505a@HIDDEN> <a2ad20c9-0706-4b2b-a18b-378ec09dc004@HIDDEN> <874ik1ak6r.fsf@HIDDEN> <ce09e592-a39b-4eeb-b93f-4f4e0aff76fe@HIDDEN> <87se7k7k2x.fsf@HIDDEN> <4e361ba8-edc8-400d-8368-0f72540419d5@HIDDEN> <87ecj434zu.fsf@HIDDEN> <7b3a8ca0-60a6-4935-83b6-912f15812e19@HIDDEN> Date: Tue, 04 Aug 2026 13:51:43 +0100 Message-ID: <87fr0u3v6o.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 81077 Cc: Pip Cet <pipcet@HIDDEN>, control <at> debbugs.gnu.org, 81077 <at> debbugs.gnu.org, Eli Zaretskii <eliz@HIDDEN> X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) unblock 81521 by 81077 thanks Dmitry Gutov [22/May 1:52am +03] wrote: > On 21/05/2026 11:13, martin rudalics wrote: > > > I'll push the fix soon, if nobody objects. > > > > Works here with both Lucid and Motif. > > On 21/05/2026 23:03, Markus Triska wrote: >> Absolute perfection, this completely solves the issue (with your >> proposed patch applied, and also in all earlier Emacs versions)! > > Thank you both for testing, I've pushed the fix to emacs-31. > > Keeping the report open for a bit, so we can discuss Pip's improvement > as well. Do we still need to keep this report open? There doesn't seem to be anything actionable forthcoming. At the very least, with the fix installed and apparently not a source of regressions, it doesn't need to be release-blocking. -- Sean Whitton
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
Full text available.Sean Whitton <spwhitton@HIDDEN>
to control <at> debbugs.gnu.org.
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Wed, 17 Jun 2026 00:29:04 -0400 (EDT) Message-ID: <2dc8b5a7-cddd-4f6e-8ce4-cb1d52659662@HIDDEN> Date: Wed, 17 Jun 2026 07:29:01 +0300 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed To: Markus Triska <triska@HIDDEN> References: <87jysz2z65.fsf@HIDDEN> <20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> <87a4tu79eo.fsf@HIDDEN> <9ab986f0-ddf5-42b7-849a-1049e65bba37@HIDDEN> <32316728-9d49-4fc0-8f0a-f9b5c42fd1a5@HIDDEN> <86v7ciyphr.fsf@HIDDEN> <5a098971-57bd-40ac-b3ca-29f03ed0505a@HIDDEN> <a2ad20c9-0706-4b2b-a18b-378ec09dc004@HIDDEN> <874ik1ak6r.fsf@HIDDEN> <ce09e592-a39b-4eeb-b93f-4f4e0aff76fe@HIDDEN> <87se7k7k2x.fsf@HIDDEN> <4e361ba8-edc8-400d-8368-0f72540419d5@HIDDEN> <87ecj434zu.fsf@HIDDEN> <7b3a8ca0-60a6-4935-83b6-912f15812e19@HIDDEN> <8733ymv1cp.fsf@HIDDEN> Content-Language: en-US From: Dmitry Gutov <dmitry@HIDDEN> In-Reply-To: <8733ymv1cp.fsf@HIDDEN> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 81077 Cc: martin rudalics <rudalics@HIDDEN>, Eli Zaretskii <eliz@HIDDEN>, 81077 <at> debbugs.gnu.org, Pip Cet <pipcet@HIDDEN> X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) Hi! On 16/06/2026 20:31, Markus Triska wrote: > The program repeatedly creates a frame, and sometimes (but not always), > the frame does not have the expected width. In that case, an error is > thrown. Starting with commit 1c9013865183f0ea2121860291, I consistently > get this error within 200 runs. I found I can make it appear earlier > when moving the mouse around in the frame. > > What I found surprising is that your patch does not reinstate any code > related to x_sync, and still seems to address the issue. Thanks for the example. > Maybe the issue > is now still present, but harder to reproduce? Avoiding this general behavior has been a goal in this fix, as well as in some of the commits addressed at bug#80662 (child frames resizing unreliably would be an eyesore for a completion popup). In some scenarios at least, we managed to fix cascading of frame resize events - which sometimes cause an older resize event arrive later, causing to frame to be resized again. In others - the eager resize and saving of dimensions improved the consistency of tracking the current size. Maybe some cases of this remain, but it's good to hear that some scenarios different from what I tested myself, react positively to the changes too. All the best, Dmitry
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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From: Markus Triska <triska@HIDDEN>
To: Dmitry Gutov <dmitry@HIDDEN>
Subject: Re: bug#81077: 31.0.60;
Sometimes only upper parts of text are unexpectedly displayed
References: <87jysz2z65.fsf@HIDDEN>
<20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN>
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<a2ad20c9-0706-4b2b-a18b-378ec09dc004@HIDDEN>
<874ik1ak6r.fsf@HIDDEN>
<ce09e592-a39b-4eeb-b93f-4f4e0aff76fe@HIDDEN>
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Date: Tue, 16 Jun 2026 19:31:18 +0200
In-Reply-To: <7b3a8ca0-60a6-4935-83b6-912f15812e19@HIDDEN> (Dmitry Gutov's
message of "Fri, 22 May 2026 01:52:51 +0300")
Message-ID: <8733ymv1cp.fsf@HIDDEN>
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Content preview: Dmitry Gutov <dmitry@HIDDEN> writes: > Keeping the report
open for a bit, so we can discuss Pip's improvement > as well. I have one
small additional input: There is a different issue, present since commit
1c9013865183f0ea21218602917b5c16ecef465d,
which your patch apparently addresses.
Specifically, the issue is present [...]
Content analysis details: (1.3 points, 10.0 required)
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X-Debbugs-Envelope-To: 81077
Cc: martin rudalics <rudalics@HIDDEN>, Eli Zaretskii <eliz@HIDDEN>,
81077 <at> debbugs.gnu.org, Pip Cet <pipcet@HIDDEN>
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Dmitry Gutov <dmitry@HIDDEN> writes:
> Keeping the report open for a bit, so we can discuss Pip's improvement
> as well.
I have one small additional input: There is a different issue, present
since commit 1c9013865183f0ea21218602917b5c16ecef465d, which your patch
apparently addresses. Specifically, the issue is present since two
x_sync calls were removed from xterm.c in 1c9013865183f0ea2121860291.
To reproduce the problem, please copy the forms below to widthglitch.el,
and then invoke Emacs as:
$ emacs -Q -l widthglitch.el
The program repeatedly creates a frame, and sometimes (but not always),
the frame does not have the expected width. In that case, an error is
thrown. Starting with commit 1c9013865183f0ea2121860291, I consistently
get this error within 200 runs. I found I can make it appear earlier
when moving the mouse around in the frame.
What I found surprising is that your patch does not reinstate any code
related to x_sync, and still seems to address the issue. Maybe the issue
is now still present, but harder to reproduce?
Please find the forms below.
Thank you and all the best,
Markus
(defvar width 200)
(defun glitching-width (x y)
(tool-bar-mode -1)
(menu-bar-mode -1)
(let ((height 100)
(frame (make-frame `((parent-frame . ,(selected-frame))
(minibuffer . nil)
(left . ,x)
(top . ,y)
(internal-border-width . 0)
(vertical-scroll-bars . nil)
(left-fringe . 0)
(right-fringe . 0)
(no-special-glyphs . t))))
(buf (get-buffer-create "showing the text")))
(set-face-attribute 'default frame :height 12)
(set-frame-width frame width nil t)
(set-frame-height frame height nil t)
(with-selected-frame frame
(switch-to-buffer buf)
(erase-buffer)
(insert (propertize "Hello!" 'face '(:height 300)))
(setq cursor-type nil
mode-line-format nil))
frame))
(let ((n 0))
(while t
(setq n (1+ n))
(let ((f (glitching-width 0 0)))
(when (= (mod n 10) 0)
(message "run: %d" n))
(sit-for 0.01)
(let ((w (frame-pixel-width f)))
(unless (= width w)
(error "Width is not %d but unexpectedly: %d, found in %d attempts" width w n)))
(delete-frame f))))
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
Full text available.
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Date: Fri, 22 May 2026 13:00:53 +0300
Message-Id: <86h5nzyd9m.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
To: Markus Triska <triska@HIDDEN>
In-Reply-To: <87ecj3svlb.fsf@HIDDEN> (message from Markus Triska on Fri,
22 May 2026 10:21:36 +0200)
Subject: Re: bug#81077: 31.0.60;
Sometimes only upper parts of text are unexpectedly displayed
References: <87jysz2z65.fsf@HIDDEN>
<20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN>
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<87a4tsex5l.fsf@HIDDEN> <87ecj3svlb.fsf@HIDDEN>
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Cc: dmitry@HIDDEN, pipcet@HIDDEN, 81077 <at> debbugs.gnu.org,
rudalics@HIDDEN
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> From: Markus Triska <triska@HIDDEN>
> Cc: Dmitry Gutov <dmitry@HIDDEN>, Eli Zaretskii <eliz@HIDDEN>, rudalics@HIDDEN, 81077 <at> debbugs.gnu.org
> Date: Fri, 22 May 2026 10:21:36 +0200
>
> Pip Cet <pipcet@HIDDEN> writes:
>
> > (I still think there are race conditions because of the Fassq in
> > Ffont_get and unblock_input's weirdness, but we'll have to wait for a
> > better smoking gun than this one to consider fixing these, it seems).
>
> This may be a very far off, but I still post this here in the hope that
> it could be at least remotely related to suspected race conditions
> involving redisplay and input, and that it could help you find it:
>
> (progn
> (switch-to-buffer (get-buffer-create "flicker"))
> (while t
> (erase-buffer)
> (insert " a b c d e f g h i j k l m n o p q")
> (goto-char (point-min))
> (replace-regexp "[a-q]" " " nil (point-min) (point-max))
> (read-event)))
>
> If I evaluate the form and then keep SPACE pressed continuously, then
> during most of the time I see a blank line, as expected. But
> occasionally, the inserted letters ("a b c d ...") flicker, and when
> that happens, then the letter "a", and only it, has a purple (I think)
> background. Especially this coloured background surprises me.
Whether redisplay does or doesn't kick in while the above loop is run
depends on various factors not directly under the control of the Lisp
program. In general, reading input can trigger redisplay if Emacs
decides that it is idle, and that decision depends in the case above
on the precise timing of the keyboard events emitted by your platform.
When redisplay does happen, you will see something like what you
describe. The "purple background" is the lazy-highlight face we use
to highlight matches when query-replace-lazy-highlight is non-nil
(which is the default).
So, unless I'm missing something, I see nothing surprising in what you
see.
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
Full text available.
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Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are
unexpectedly displayed
To: Markus Triska <triska@HIDDEN>, Pip Cet <pipcet@HIDDEN>
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> (progn
> (switch-to-buffer (get-buffer-create "flicker"))
> (while t
> (erase-buffer)
> (insert " a b c d e f g h i j k l m n o p q")
> (goto-char (point-min))
> (replace-regexp "[a-q]" " " nil (point-min) (point-max))
> (read-event)))
>
> If I evaluate the form and then keep SPACE pressed continuously, then
> during most of the time I see a blank line, as expected. But
> occasionally, the inserted letters ("a b c d ...") flicker, and when
> that happens, then the letter "a", and only it, has a purple (I think)
> background.
The doc-string of 'replace-regexp' warns about this as:
This function is usually the wrong thing to use in a Lisp program.
What you probably want is a loop like this:
(while (re-search-forward REGEXP nil t)
(replace-match TO-STRING nil nil))
which will run faster and will not set the mark or print anything."
> Especially this coloured background surprises me.
It's the 'query-replace' background.
martin
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
Full text available.
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From: Markus Triska <triska@HIDDEN>
To: Pip Cet <pipcet@HIDDEN>
Subject: Re: bug#81077: 31.0.60;
Sometimes only upper parts of text are unexpectedly displayed
References: <87jysz2z65.fsf@HIDDEN>
<20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN>
<87a4tu79eo.fsf@HIDDEN>
<9ab986f0-ddf5-42b7-849a-1049e65bba37@HIDDEN>
<32316728-9d49-4fc0-8f0a-f9b5c42fd1a5@HIDDEN>
<86v7ciyphr.fsf@HIDDEN>
<5a098971-57bd-40ac-b3ca-29f03ed0505a@HIDDEN>
<a2ad20c9-0706-4b2b-a18b-378ec09dc004@HIDDEN>
<87a4tsex5l.fsf@HIDDEN>
Date: Fri, 22 May 2026 10:21:36 +0200
In-Reply-To: <87a4tsex5l.fsf@HIDDEN> (Pip Cet's message of "Thu, 21
May 2026 12:58:39 +0000")
Message-ID: <87ecj3svlb.fsf@HIDDEN>
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Content preview: Pip Cet <pipcet@HIDDEN> writes: > (I still think
there
are race conditions because of the Fassq in > Ffont_get and unblock_input's
weirdness, but we'll have to wait for a > better smoking gun than this one
to consider fixing these, [...]
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Pip Cet <pipcet@HIDDEN> writes:
> (I still think there are race conditions because of the Fassq in
> Ffont_get and unblock_input's weirdness, but we'll have to wait for a
> better smoking gun than this one to consider fixing these, it seems).
This may be a very far off, but I still post this here in the hope that
it could be at least remotely related to suspected race conditions
involving redisplay and input, and that it could help you find it:
(progn
(switch-to-buffer (get-buffer-create "flicker"))
(while t
(erase-buffer)
(insert " a b c d e f g h i j k l m n o p q")
(goto-char (point-min))
(replace-regexp "[a-q]" " " nil (point-min) (point-max))
(read-event)))
If I evaluate the form and then keep SPACE pressed continuously, then
during most of the time I see a blank line, as expected. But
occasionally, the inserted letters ("a b c d ...") flicker, and when
that happens, then the letter "a", and only it, has a purple (I think)
background. Especially this coloured background surprises me.
This phenomenon occurs starting from at least Emacs 26.1, without your
proposed patch, and also with it, and also with "emacs -nw".
I hope this is useful for you, otherwise please ignore it.
Thank you and all the best,
Markus
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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Thu, 21 May 2026 18:52:52 -0400 (EDT) Message-ID: <7b3a8ca0-60a6-4935-83b6-912f15812e19@HIDDEN> Date: Fri, 22 May 2026 01:52:51 +0300 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed To: Markus Triska <triska@HIDDEN>, martin rudalics <rudalics@HIDDEN> References: <87jysz2z65.fsf@HIDDEN> <20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> <87a4tu79eo.fsf@HIDDEN> <9ab986f0-ddf5-42b7-849a-1049e65bba37@HIDDEN> <32316728-9d49-4fc0-8f0a-f9b5c42fd1a5@HIDDEN> <86v7ciyphr.fsf@HIDDEN> <5a098971-57bd-40ac-b3ca-29f03ed0505a@HIDDEN> <a2ad20c9-0706-4b2b-a18b-378ec09dc004@HIDDEN> <874ik1ak6r.fsf@HIDDEN> <ce09e592-a39b-4eeb-b93f-4f4e0aff76fe@HIDDEN> <87se7k7k2x.fsf@HIDDEN> <4e361ba8-edc8-400d-8368-0f72540419d5@HIDDEN> <87ecj434zu.fsf@HIDDEN> Content-Language: en-US From: Dmitry Gutov <dmitry@HIDDEN> In-Reply-To: <87ecj434zu.fsf@HIDDEN> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 81077 Cc: Pip Cet <pipcet@HIDDEN>, Eli Zaretskii <eliz@HIDDEN>, 81077 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) On 21/05/2026 11:13, martin rudalics wrote: > > I'll push the fix soon, if nobody objects. > > Works here with both Lucid and Motif. On 21/05/2026 23:03, Markus Triska wrote: > Absolute perfection, this completely solves the issue (with your > proposed patch applied, and also in all earlier Emacs versions)! Thank you both for testing, I've pushed the fix to emacs-31. Keeping the report open for a bit, so we can discuss Pip's improvement as well.
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
Full text available.Received: (at 81077) by debbugs.gnu.org; 21 May 2026 20:03:05 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu May 21 16:03:05 2026 Received: from localhost ([127.0.0.1]:43035 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1wQ9bl-0004oW-Gr for submit <at> debbugs.gnu.org; Thu, 21 May 2026 16:03:05 -0400 Received: from [78.47.144.35] (port=38508 helo=metalevel.at) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <triska@HIDDEN>) id 1wQ9bi-0004o1-Oj for 81077 <at> debbugs.gnu.org; Thu, 21 May 2026 16:03:03 -0400 Received: by metalevel.at (Postfix, from userid 1000) id 86C189C7A6; Thu, 21 May 2026 22:03:01 +0200 (CEST) From: Markus Triska <triska@HIDDEN> To: Dmitry Gutov <dmitry@HIDDEN> Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed References: <87jysz2z65.fsf@HIDDEN> <20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> <87a4tu79eo.fsf@HIDDEN> <9ab986f0-ddf5-42b7-849a-1049e65bba37@HIDDEN> <32316728-9d49-4fc0-8f0a-f9b5c42fd1a5@HIDDEN> <86v7ciyphr.fsf@HIDDEN> <5a098971-57bd-40ac-b3ca-29f03ed0505a@HIDDEN> <a2ad20c9-0706-4b2b-a18b-378ec09dc004@HIDDEN> <874ik1ak6r.fsf@HIDDEN> <ce09e592-a39b-4eeb-b93f-4f4e0aff76fe@HIDDEN> <87se7k7k2x.fsf@HIDDEN> <4e361ba8-edc8-400d-8368-0f72540419d5@HIDDEN> Date: Thu, 21 May 2026 22:03:01 +0200 Message-ID: <87ecj434zu.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: 1.3 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Dmitry Gutov <dmitry@HIDDEN> writes: > If this is the main issue, how about reusing the trick from the > Posframe package: create the frame as invisible, then resize, and then > make it visible. Here's the full updated definition: Content analysis details: (1.3 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 SPF_NONE SPF: sender does not publish an SPF Record 1.3 RDNS_NONE Delivered to internal network by a host with no rDNS X-Debbugs-Envelope-To: 81077 Cc: rudalics@HIDDEN, Eli Zaretskii <eliz@HIDDEN>, 81077 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: 0.3 (/) Dmitry Gutov <dmitry@HIDDEN> writes: > If this is the main issue, how about reusing the trick from the > Posframe package: create the frame as invisible, then resize, and then > make it visible. Here's the full updated definition: Absolute perfection, this completely solves the issue (with your proposed patch applied, and also in all earlier Emacs versions)! Thank you a lot! All the best, Markus
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Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are
unexpectedly displayed
To: Markus Triska <triska@HIDDEN>
References: <87jysz2z65.fsf@HIDDEN>
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From: Dmitry Gutov <dmitry@HIDDEN>
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Hi Markus,
On 21/05/2026 20:23, Markus Triska wrote:
> Dear Dmitry, all,
>
> to stress how awesome your change is, please let me add the following:
>
> #52666 was in my opinion so far not totally addressed: There remained
> frequent flickering of the mode line under certain conditions. The great
> news is that your proposed change improves the issue significantly in
> certain situations, which is an awesome improvement and something for
> which I'm extremely grateful, thank you a lot!
You're very welcome!
To add a bit of context: Emacs 31 contains more changes already, with
the combined aim to reduce flickering for child frames (bug#80662,
bug#80943). One of them created a regression that led to this report ;-)
I'm curious what exactly you use child frames for. In any case, if you
also resize them subsequently, or move, or are annoyed about the extra
flicker when a frame is hidden, you might want to try the patch in
bug#80961 as well - which could really benefit from more feedback. But
it's for different scenarios than the present one.
> I have constructed a test case that exhibits the issue on all Emacs
> versions from at least 26.1 through 30.2, available from:
>
> https://www.metalevel.at/ei/flicker-rect.el
>
> Please find the contents of the file also included below.
>
> To see the issue, start any Emacs version between 26.1 and 30.2 with:
>
> $ emacs -Q -l flicker-rect.el
>
> and then press:
>
> F10 F10 F10 F10 ...
>
> seeing the mode line below the rectangle almost always unexpectedly
> flickering when the rectangle is displayed.
What I see is the frame first appearing as a white rectangle (the usual
background color) 2x as big in width and height as the resulting black
rectangle. Not 100% sure why - maybe it's just the minimum size that we
allow the frames to be.
I get the same effect just using these simpler values:
(width . 1)
(height . 1)
If this is the main issue, how about reusing the trick from the Posframe
package: create the frame as invisible, then resize, and then make it
visible. Here's the full updated definition:
(defun flicker-rect (x y)
(let* ((width rect-width)
(height rect-height)
(frame (make-frame `((parent-frame . ,(selected-frame))
(minibuffer . nil)
(left . ,x)
(top . ,y)
(internal-border-width . 0)
(vertical-scroll-bars . nil)
(left-fringe . 0)
(right-fringe . 0)
(no-special-glyphs . t) ; see #52929
(visibility . nil)
)))
(buf (get-buffer-create "showing the image")))
(set-face-attribute 'default frame :height 1)
(set-frame-width frame width nil t)
(set-frame-height frame height nil t)
(make-frame-visible frame)
(with-selected-frame frame
(switch-to-buffer buf)
(erase-buffer)
(insert-image (create-image (base64-decode-string rect-png) nil t))
(setq cursor-type nil
mode-line-format nil))
(cons frame buf)))
> Now the good news: With the patch you proposed applied, the flickering
> occurs far less frequently (in fact almost never, and if it occurs,
> then it is far less visible), though only if I start Emacs with:
>
> $ emacs --no-init-file --no-site-file --no-splash -l flicker-rect.el
>
> As far as I can tell, this is *almost* equivalent to "-Q", with the
> single exception of processing X resources, which are in my case:
>
> *FontBackend: xft
> Xft.dpi: 96
> Xft.hinting: true
> Xft.hintstyle: hintslight
>
> For comparison, Emacs versions 26.1, 29.1 and 30.2 still exhibit the
> much more frequent flickering also when invoked in this away.
I can't really reproduce a difference with these X resources settings,
or by changing the hinting style in Gnome Tweaks. So it's possible I
don't see some remaining issue.
What I suggest though, is for you to try the definition above and then
if visual annoyance remains, use a screen recorder to capture how it
looks exactly. Then you can upload the video somewhere, or at least save
some frames from it. If some screen recorder doesn't capture all detail,
one using fixed FPS might do that better - so for example I often use
the build-in screen recorder in GNOME, but for finer transitions switch
to Kooha (ffmpeg capture doesn't work here in Wayland).
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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From: Markus Triska <triska@HIDDEN>
To: Dmitry Gutov <dmitry@HIDDEN>
Subject: Re: bug#81077: 31.0.60;
Sometimes only upper parts of text are unexpectedly displayed
References: <87jysz2z65.fsf@HIDDEN>
<20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN>
<87a4tu79eo.fsf@HIDDEN>
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Date: Thu, 21 May 2026 19:23:34 +0200
In-Reply-To: <ce09e592-a39b-4eeb-b93f-4f4e0aff76fe@HIDDEN> (Dmitry Gutov's
message of "Thu, 21 May 2026 02:27:50 +0300")
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Content preview: Dear Dmitry, all, to stress how awesome your change is,
please
let me add the following: #52666 was in my opinion so far not totally
addressed:
There remained frequent flickering of the mode line under certain conditions.
The great news is that your proposed change improves the issue sign [...]
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Dear Dmitry, all,
to stress how awesome your change is, please let me add the following:
#52666 was in my opinion so far not totally addressed: There remained
frequent flickering of the mode line under certain conditions. The great
news is that your proposed change improves the issue significantly in
certain situations, which is an awesome improvement and something for
which I'm extremely grateful, thank you a lot!
I have constructed a test case that exhibits the issue on all Emacs
versions from at least 26.1 through 30.2, available from:
https://www.metalevel.at/ei/flicker-rect.el
Please find the contents of the file also included below.
To see the issue, start any Emacs version between 26.1 and 30.2 with:
$ emacs -Q -l flicker-rect.el
and then press:
F10 F10 F10 F10 ...
seeing the mode line below the rectangle almost always unexpectedly
flickering when the rectangle is displayed.
Now the good news: With the patch you proposed applied, the flickering
occurs far less frequently (in fact almost never, and if it occurs,
then it is far less visible), though only if I start Emacs with:
$ emacs --no-init-file --no-site-file --no-splash -l flicker-rect.el
As far as I can tell, this is *almost* equivalent to "-Q", with the
single exception of processing X resources, which are in my case:
*FontBackend: xft
Xft.dpi: 96
Xft.hinting: true
Xft.hintstyle: hintslight
For comparison, Emacs versions 26.1, 29.1 and 30.2 still exhibit the
much more frequent flickering also when invoked in this away.
Can you reproduce this? If so, would it be possible to extend the
improvement also to when Emacs is started with "-Q"?
It is my hope that this test case may help to track down remaining
issues that also you Pip mentioned.
Thank you all so much for your work on this!
The contents of flicker-rect.el follow.
All the best,
Markus
;; -*- lexical-binding: t; -*-
(defconst rect-png "\
iVBORw0KGgoAAAANSUhEUgAAAGYAAAA0CAYAAAB4mU2eAAAAAXNSR0IB2cksfwAAAAZiS0dEAP8A
/wD/oL2nkwAAAAlwSFlzAAALEwAACxMBAJqcGAAAACB0RVh0U29mdHdhcmUAR1BMIEdob3N0c2Ny
aXB0IDEwLjA1LjHGEMIMAAAAn0lEQVR4nO3csQ3EAAwDMfuR/Vd2Fvg+V5ATCLhee3dDzzMzs7vq
hNzd/r4ewX/CRAkTJUyUMFHCRAkTJUyUMFHCRAkTJUyUMFHCRAkTJUyUMFHCRAkTJUyUMFHCRAkT
JUyUMFHCRAkTJUyUMFHCRAkTJUyUMFHCRAkTJUyUMFHCRAkTJUyUMFHCRAkTJUyUMFHCRAkTJUyU
MFHrerHpBRlWCmOA+QBIAAAAAElFTkSuQmCC")
(defconst rect-width 102)
(defconst rect-height 52)
(tool-bar-mode -1)
(menu-bar-mode -1)
(defun flicker-rect (x y)
(let* ((width rect-width)
(height rect-height)
(frame (make-frame `((parent-frame . ,(selected-frame))
(minibuffer . nil)
(left . ,x)
(top . ,y)
(internal-border-width . 0)
(vertical-scroll-bars . nil)
(left-fringe . 0)
(right-fringe . 0)
(no-special-glyphs . t) ; see #52929
;; not setting the width/height causes
;; mode line flickering (see #52666)
(width . (text-pixels . ,width))
(height . (text-pixels . ,height)))))
(buf (get-buffer-create "showing the image")))
(set-face-attribute 'default frame :height 1)
(set-frame-width frame width nil t)
(set-frame-height frame height nil t)
(with-selected-frame frame
(switch-to-buffer buf)
(erase-buffer)
(insert-image (create-image (base64-decode-string rect-png) nil t))
(setq cursor-type nil
mode-line-format nil))
(cons frame buf)))
(defun show-rect ()
(interactive)
(let ((fb (flicker-rect (+ (frame-scroll-bar-width)
(frame-fringe-width))
(- (window-pixel-height)
rect-height
(window-mode-line-height)))))
(read-key)
(delete-frame (car fb))
(kill-buffer (cdr fb))))
(global-set-key [f10] #'show-rect)
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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Thu, 21 May 2026 10:52:21 -0400 (EDT) Message-ID: <9d810074-79b5-4976-889c-a0318a71fc80@HIDDEN> Date: Thu, 21 May 2026 17:52:18 +0300 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed To: Pip Cet <pipcet@HIDDEN> References: <87jysz2z65.fsf@HIDDEN> <20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> <87a4tu79eo.fsf@HIDDEN> <9ab986f0-ddf5-42b7-849a-1049e65bba37@HIDDEN> <32316728-9d49-4fc0-8f0a-f9b5c42fd1a5@HIDDEN> <86v7ciyphr.fsf@HIDDEN> <5a098971-57bd-40ac-b3ca-29f03ed0505a@HIDDEN> <a2ad20c9-0706-4b2b-a18b-378ec09dc004@HIDDEN> <87a4tsex5l.fsf@HIDDEN> Content-Language: en-US From: Dmitry Gutov <dmitry@HIDDEN> In-Reply-To: <87a4tsex5l.fsf@HIDDEN> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 81077 Cc: rudalics@HIDDEN, Eli Zaretskii <eliz@HIDDEN>, 81077 <at> debbugs.gnu.org, triska@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) On 21/05/2026 15:58, Pip Cet wrote: > That calls change_frame_size (and update_wm_hints etc.) a lot, often > unnecessarily. How about this instead? It would save a few calls and > conceivably avoid a situation where the window manager keeps resizing a > window to what's already its current size in response to the wm hints. Maybe we would prefer to split that into two changes: mine for the release branch (which reverts to the existing behavior for top-level frames) and your addition later to master. I'm not sure if there will be much change in performance (resizing top-level frames is relatively slow to begin with), but avoiding the second call with the same dimensions feels nice. > diff --git a/src/widget.c b/src/widget.c > index b843bca1fb9..26dbaeb7eae 100644 > --- a/src/widget.c > +++ b/src/widget.c > @@ -428,8 +428,17 @@ EmacsFrameResize (Widget widget) > ew->core.width, ew->core.height, > f->new_width, f->new_height); > > - if (FRAME_PIXEL_WIDTH (f) == ew->core.width > - && FRAME_PIXEL_HEIGHT (f) == ew->core.height) > + if (FRAME_PARENT_FRAME (f)) > + return; > + > + int current_width = (f->new_width == -1 > + ? FRAME_PIXEL_WIDTH (f) > + : f->new_width); Should we test new_size_p here maybe? > + int current_height = (f->new_height == -1 > + ? FRAME_PIXEL_HEIGHT (f) > + : f->new_height); > + if (current_width == ew->core.width && > + current_height == ew->core.height) > return; > > change_frame_size (f, ew->core.width, ew->core.height, > > (I still think there are race conditions because of the Fassq in > Ffont_get and unblock_input's weirdness, but we'll have to wait for a > better smoking gun than this one to consider fixing these, it seems). Maybe some sort of tester looping frame resize and doing screenshots could catch the resulting inconsistency. A project for another day.
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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Date: Thu, 21 May 2026 12:58:39 +0000
To: Dmitry Gutov <dmitry@HIDDEN>
From: Pip Cet <pipcet@HIDDEN>
Subject: Re: bug#81077: 31.0.60;
Sometimes only upper parts of text are unexpectedly displayed
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"Dmitry Gutov" <dmitry@HIDDEN> writes:
> On 20/05/2026 21:31, Dmitry Gutov wrote:
>> On 20/05/2026 20:12, Eli Zaretskii wrote:
>>> If the second change fixes the problem, then there's some factor at
>>> work here which we don't understand.=C2=A0 Because disabling optimizati=
on
>>> in a case that's supposed to be a no-op cannot possibly fix anything.
>>
>> Yes, I'm trying to do some log-debugging to figure that out.
>>
>> It might be "just" a timing issue (but a new or a pre-existing one?),
>> and the exactly matching cutoff dimensions with "tool-bar enabled"
>> config might be a coincidence as well.
>
> It seems like after processing several resize events (ConfigureNotify)
> we get outdated values in f->new_height, f->new_width and new_size_p, so
> by taking early exit after we skip updating them to -1, -1, false.
>
> Which then triggers a resize at the beginning of the subsequent
> redisplay (inside do_pending_window_change).
>
> So removing the early exit might be TRT.
>
> BUT which call sites set new_height and new_width? It seems that with Xt
> the only caller of change_frame_size with DELAY=3Dtrue is EmacsFrameResiz=
e
> itself (so we get those values from the previous ConfigureNotify
> events). Now that we resize child frames eagerly, the delayed changes
> seem unnecessary. The other two changes (updating wm size hints and
> cancel_mouse_face) happen in x_set_window_size and its friend anyway,
> and anyway no need for wm hints on child frames.
>
> So here's probably a better fix, works for both scenarios here and my
> usual completion-popup scenario:
>
> diff --git a/src/widget.c b/src/widget.c
> index b843bca1fb9..9823c1285f6 100644
> --- a/src/widget.c
> +++ b/src/widget.c
> @@ -428,8 +428,7 @@ EmacsFrameResize (Widget widget)
> ew->core.width, ew->core.height,
> f->new_width, f->new_height);
>
> - if (FRAME_PIXEL_WIDTH (f) =3D=3D ew->core.width
> - && FRAME_PIXEL_HEIGHT (f) =3D=3D ew->core.height)
> + if (FRAME_PARENT_FRAME (f))=09/* Size always up to date. */
> return;
>
> change_frame_size (f, ew->core.width, ew->core.height,
That old code certainly looks incorrect: change_frame_size updates
f->new_width and f->new_height, not FRAME_PIXEL_WIDTH and
FRAME_PIXEL_HEIGHT.
> Please test, Markus.
That calls change_frame_size (and update_wm_hints etc.) a lot, often
unnecessarily. How about this instead? It would save a few calls and
conceivably avoid a situation where the window manager keeps resizing a
window to what's already its current size in response to the wm hints.
diff --git a/src/widget.c b/src/widget.c
index b843bca1fb9..26dbaeb7eae 100644
--- a/src/widget.c
+++ b/src/widget.c
@@ -428,8 +428,17 @@ EmacsFrameResize (Widget widget)
ew->core.width, ew->core.height,
f->new_width, f->new_height);
=20
- if (FRAME_PIXEL_WIDTH (f) =3D=3D ew->core.width
- && FRAME_PIXEL_HEIGHT (f) =3D=3D ew->core.height)
+ if (FRAME_PARENT_FRAME (f))
+ return;
+
+ int current_width =3D (f->new_width =3D=3D -1
+=09=09 ? FRAME_PIXEL_WIDTH (f)
+=09=09 : f->new_width);
+ int current_height =3D (f->new_height =3D=3D -1
+=09=09 ? FRAME_PIXEL_HEIGHT (f)
+=09=09 : f->new_height);
+ if (current_width =3D=3D ew->core.width &&
+ current_height =3D=3D ew->core.height)
return;
=20
change_frame_size (f, ew->core.width, ew->core.height,
(I still think there are race conditions because of the Fassq in
Ffont_get and unblock_input's weirdness, but we'll have to wait for a
better smoking gun than this one to consider fixing these, it seems).
Pip
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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Thu, 21 May 2026 08:22:42 -0400 (EDT) Message-ID: <1deb8d70-aaf1-45b9-8e2a-99589239fcbf@HIDDEN> Date: Thu, 21 May 2026 15:22:40 +0300 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed To: Eli Zaretskii <eliz@HIDDEN> References: <87jysz2z65.fsf@HIDDEN> <20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> <87a4tu79eo.fsf@HIDDEN> <9ab986f0-ddf5-42b7-849a-1049e65bba37@HIDDEN> <32316728-9d49-4fc0-8f0a-f9b5c42fd1a5@HIDDEN> <86v7ciyphr.fsf@HIDDEN> <5a098971-57bd-40ac-b3ca-29f03ed0505a@HIDDEN> <a2ad20c9-0706-4b2b-a18b-378ec09dc004@HIDDEN> <874ik1ak6r.fsf@HIDDEN> <ce09e592-a39b-4eeb-b93f-4f4e0aff76fe@HIDDEN> <86h5o1z2on.fsf@HIDDEN> Content-Language: en-US From: Dmitry Gutov <dmitry@HIDDEN> In-Reply-To: <86h5o1z2on.fsf@HIDDEN> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -0.0 (/) X-Debbugs-Envelope-To: 81077 Cc: rudalics@HIDDEN, 81077 <at> debbugs.gnu.org, triska@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) On 21/05/2026 09:39, Eli Zaretskii wrote: > Which configurations are affected by the change, in addition to Lucid, > where this problem was discovered? We might need to limit the fix > only to some configurations, to avoid unintended consequences on > platforms where the problem doesn't happen at all. The patch is for widget.c, so it only touches the Xt ports (Lucid and Motif), both of which are affected.
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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<triska@HIDDEN> References: <87jysz2z65.fsf@HIDDEN> <20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> <87a4tu79eo.fsf@HIDDEN> <9ab986f0-ddf5-42b7-849a-1049e65bba37@HIDDEN> <32316728-9d49-4fc0-8f0a-f9b5c42fd1a5@HIDDEN> <86v7ciyphr.fsf@HIDDEN> <5a098971-57bd-40ac-b3ca-29f03ed0505a@HIDDEN> <a2ad20c9-0706-4b2b-a18b-378ec09dc004@HIDDEN> <874ik1ak6r.fsf@HIDDEN> <ce09e592-a39b-4eeb-b93f-4f4e0aff76fe@HIDDEN> Content-Language: en-US From: martin rudalics <rudalics@HIDDEN> In-Reply-To: <ce09e592-a39b-4eeb-b93f-4f4e0aff76fe@HIDDEN> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:g+M5IiQBNzbOJv48Kz/gJ8sYtxFUuRVBnw3ZyXgzIrH71EsfvLo J6hCwgDSESuZ1pbUMkGWLRpU9XK5GpugYJCjrqRHZlUrs4vhGAewK2/v//S2XRKuBcoObvm IktUKfOwFMFMAT5Wc9RQrN8rKP+o36S+q0VOlP8Hu6HDNj0m40bxCR6nQroS/xAj4rBk2Eg MBBESbOMh6fA70LagBVGw== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:5lMjjCkdga4=;v7gIEX8zJvEbGTAG5409uMB8Z8/ 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<eliz@HIDDEN>, 81077 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) > I'll push the fix soon, if nobody objects. Works here with both Lucid and Motif. martin
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
Full text available.Received: (at 81077) by debbugs.gnu.org; 21 May 2026 06:39:53 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu May 21 02:39:52 2026 Received: from localhost ([127.0.0.1]:34616 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1wPx4R-0006Rg-Cg for submit <at> debbugs.gnu.org; Thu, 21 May 2026 02:39:52 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41328) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1wPx4O-0006Qg-HV for 81077 <at> debbugs.gnu.org; Thu, 21 May 2026 02:39:49 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1wPx4E-00050s-SY; Thu, 21 May 2026 02:39:42 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=nFnEENP6qKRjWvmL0Ygr47r7IkItYKoogrU7UgyWS/k=; b=mg3Munbh5yxF qW1mvpDQpRRVKAwEs8u6mk24Lgz3yPt8rinSNFQ1651xipVgMb0CeKI/nA9meP/BhIdezTYxa154J qREAxhkdOPUiWv3MEnZFVWewYYfYkMMJbiO7vDpr2WFFXAnYNKhuM1/CLsVqHCF5oZfT1JQURagvM /OUzThlm61H/nfPqnpBBierrbg5pYQFUoGJJiNgO1eldQx0hcRLlbRyJO1JzqwdHNCt4NOaYYG5xg hypgxVv7p64Sgb+8+6n+a2LzdlmWRbabdI4BAU2JdrHUB/5XGzV7eY06qg+9f7rZM9QLSveIqB2YE 40UCJseHC6TeLsJdHVx0LQ==; Date: Thu, 21 May 2026 09:39:36 +0300 Message-Id: <86h5o1z2on.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Dmitry Gutov <dmitry@HIDDEN> In-Reply-To: <ce09e592-a39b-4eeb-b93f-4f4e0aff76fe@HIDDEN> (message from Dmitry Gutov on Thu, 21 May 2026 02:27:50 +0300) Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed References: <87jysz2z65.fsf@HIDDEN> <20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> <87a4tu79eo.fsf@HIDDEN> <9ab986f0-ddf5-42b7-849a-1049e65bba37@HIDDEN> <32316728-9d49-4fc0-8f0a-f9b5c42fd1a5@HIDDEN> <86v7ciyphr.fsf@HIDDEN> <5a098971-57bd-40ac-b3ca-29f03ed0505a@HIDDEN> <a2ad20c9-0706-4b2b-a18b-378ec09dc004@HIDDEN> <874ik1ak6r.fsf@HIDDEN> <ce09e592-a39b-4eeb-b93f-4f4e0aff76fe@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 81077 Cc: rudalics@HIDDEN, 81077 <at> debbugs.gnu.org, triska@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > Date: Thu, 21 May 2026 02:27:50 +0300 > Cc: rudalics@HIDDEN, Eli Zaretskii <eliz@HIDDEN>, 81077 <at> debbugs.gnu.org > From: Dmitry Gutov <dmitry@HIDDEN> > > Hi Markus, > > On 20/05/2026 23:40, Markus Triska wrote: > > This works amazingly well, thank you so much! > > Thanks for reporting, and your time on doing the bisect. > > I'll push the fix soon, if nobody objects. Which configurations are affected by the change, in addition to Lucid, where this problem was discovered? We might need to limit the fix only to some configurations, to avoid unintended consequences on platforms where the problem doesn't happen at all.
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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Wed, 20 May 2026 19:27:52 -0400 (EDT) Message-ID: <ce09e592-a39b-4eeb-b93f-4f4e0aff76fe@HIDDEN> Date: Thu, 21 May 2026 02:27:50 +0300 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed To: Markus Triska <triska@HIDDEN> References: <87jysz2z65.fsf@HIDDEN> <20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> <87a4tu79eo.fsf@HIDDEN> <9ab986f0-ddf5-42b7-849a-1049e65bba37@HIDDEN> <32316728-9d49-4fc0-8f0a-f9b5c42fd1a5@HIDDEN> <86v7ciyphr.fsf@HIDDEN> <5a098971-57bd-40ac-b3ca-29f03ed0505a@HIDDEN> <a2ad20c9-0706-4b2b-a18b-378ec09dc004@HIDDEN> <874ik1ak6r.fsf@HIDDEN> Content-Language: en-US From: Dmitry Gutov <dmitry@HIDDEN> In-Reply-To: <874ik1ak6r.fsf@HIDDEN> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 81077 Cc: rudalics@HIDDEN, Eli Zaretskii <eliz@HIDDEN>, 81077 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) Hi Markus, On 20/05/2026 23:40, Markus Triska wrote: > This works amazingly well, thank you so much! Thanks for reporting, and your time on doing the bisect. I'll push the fix soon, if nobody objects.
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
Full text available.Received: (at 81077) by debbugs.gnu.org; 20 May 2026 20:40:50 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed May 20 16:40:49 2026 Received: from localhost ([127.0.0.1]:58707 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1wPnii-0008Qw-PI for submit <at> debbugs.gnu.org; Wed, 20 May 2026 16:40:49 -0400 Received: from [78.47.144.35] (port=59672 helo=metalevel.at) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <triska@HIDDEN>) id 1wPnif-0008QP-U2 for 81077 <at> debbugs.gnu.org; Wed, 20 May 2026 16:40:46 -0400 Received: by metalevel.at (Postfix, from userid 1000) id A37FE9C7A3; Wed, 20 May 2026 22:40:44 +0200 (CEST) From: Markus Triska <triska@HIDDEN> To: Dmitry Gutov <dmitry@HIDDEN> Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed References: <87jysz2z65.fsf@HIDDEN> <20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> <87a4tu79eo.fsf@HIDDEN> <9ab986f0-ddf5-42b7-849a-1049e65bba37@HIDDEN> <32316728-9d49-4fc0-8f0a-f9b5c42fd1a5@HIDDEN> <86v7ciyphr.fsf@HIDDEN> <5a098971-57bd-40ac-b3ca-29f03ed0505a@HIDDEN> <a2ad20c9-0706-4b2b-a18b-378ec09dc004@HIDDEN> Date: Wed, 20 May 2026 22:40:44 +0200 In-Reply-To: <a2ad20c9-0706-4b2b-a18b-378ec09dc004@HIDDEN> (Dmitry Gutov's message of "Wed, 20 May 2026 23:02:42 +0300") Message-ID: <874ik1ak6r.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: 1.3 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Dear Dmitry, Dmitry Gutov <dmitry@HIDDEN> writes: > So here's probably a better fix, works for both scenarios here and my > usual completion-popup scenario: Content analysis details: (1.3 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 SPF_NONE SPF: sender does not publish an SPF Record 1.3 RDNS_NONE Delivered to internal network by a host with no rDNS X-Debbugs-Envelope-To: 81077 Cc: rudalics@HIDDEN, Eli Zaretskii <eliz@HIDDEN>, 81077 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: 0.3 (/) Dear Dmitry, Dmitry Gutov <dmitry@HIDDEN> writes: > So here's probably a better fix, works for both scenarios here and my > usual completion-popup scenario: This works amazingly well, thank you so much! All the best, Markus
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are
unexpectedly displayed
From: Dmitry Gutov <dmitry@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
References: <87jysz2z65.fsf@HIDDEN>
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On 20/05/2026 21:31, Dmitry Gutov wrote:
> On 20/05/2026 20:12, Eli Zaretskii wrote:
>> If the second change fixes the problem, then there's some factor at
>> work here which we don't understand. Because disabling optimization
>> in a case that's supposed to be a no-op cannot possibly fix anything.
>
> Yes, I'm trying to do some log-debugging to figure that out.
>
> It might be "just" a timing issue (but a new or a pre-existing one?),
> and the exactly matching cutoff dimensions with "tool-bar enabled"
> config might be a coincidence as well.
It seems like after processing several resize events (ConfigureNotify)
we get outdated values in f->new_height, f->new_width and new_size_p, so
by taking early exit after we skip updating them to -1, -1, false.
Which then triggers a resize at the beginning of the subsequent
redisplay (inside do_pending_window_change).
So removing the early exit might be TRT.
BUT which call sites set new_height and new_width? It seems that with Xt
the only caller of change_frame_size with DELAY=true is EmacsFrameResize
itself (so we get those values from the previous ConfigureNotify
events). Now that we resize child frames eagerly, the delayed changes
seem unnecessary. The other two changes (updating wm size hints and
cancel_mouse_face) happen in x_set_window_size and its friend anyway,
and anyway no need for wm hints on child frames.
So here's probably a better fix, works for both scenarios here and my
usual completion-popup scenario:
diff --git a/src/widget.c b/src/widget.c
index b843bca1fb9..9823c1285f6 100644
--- a/src/widget.c
+++ b/src/widget.c
@@ -428,8 +428,7 @@ EmacsFrameResize (Widget widget)
ew->core.width, ew->core.height,
f->new_width, f->new_height);
- if (FRAME_PIXEL_WIDTH (f) == ew->core.width
- && FRAME_PIXEL_HEIGHT (f) == ew->core.height)
+ if (FRAME_PARENT_FRAME (f)) /* Size always up to date. */
return;
change_frame_size (f, ew->core.width, ew->core.height,
Please test, Markus.
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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Wed, 20 May 2026 14:31:38 -0400 (EDT) Message-ID: <5a098971-57bd-40ac-b3ca-29f03ed0505a@HIDDEN> Date: Wed, 20 May 2026 21:31:36 +0300 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed To: Eli Zaretskii <eliz@HIDDEN> References: <87jysz2z65.fsf@HIDDEN> <20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> <87a4tu79eo.fsf@HIDDEN> <9ab986f0-ddf5-42b7-849a-1049e65bba37@HIDDEN> <32316728-9d49-4fc0-8f0a-f9b5c42fd1a5@HIDDEN> <86v7ciyphr.fsf@HIDDEN> Content-Language: en-US From: Dmitry Gutov <dmitry@HIDDEN> In-Reply-To: <86v7ciyphr.fsf@HIDDEN> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -0.7 (/) X-Debbugs-Envelope-To: 81077 Cc: rudalics@HIDDEN, 81077 <at> debbugs.gnu.org, triska@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) On 20/05/2026 20:12, Eli Zaretskii wrote: > If the second change fixes the problem, then there's some factor at > work here which we don't understand. Because disabling optimization > in a case that's supposed to be a no-op cannot possibly fix anything. Yes, I'm trying to do some log-debugging to figure that out. It might be "just" a timing issue (but a new or a pre-existing one?), and the exactly matching cutoff dimensions with "tool-bar enabled" config might be a coincidence as well.
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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Date: Wed, 20 May 2026 20:12:16 +0300
Message-Id: <86v7ciyphr.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
To: Dmitry Gutov <dmitry@HIDDEN>
In-Reply-To: <32316728-9d49-4fc0-8f0a-f9b5c42fd1a5@HIDDEN> (message from
Dmitry Gutov on Wed, 20 May 2026 19:02:37 +0300)
Subject: Re: bug#81077: 31.0.60;
Sometimes only upper parts of text are unexpectedly displayed
References: <87jysz2z65.fsf@HIDDEN>
<20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> <87a4tu79eo.fsf@HIDDEN>
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> Cc: 81077 <at> debbugs.gnu.org
> Date: Wed, 20 May 2026 19:02:37 +0300
> From: Dmitry Gutov <dmitry@HIDDEN>
>
> The change a6a3b32208 does seem to trigger the problem. More curiously,
> reverting one of two different parts of it seems to fix it.
>
> So either making x_set_window_size_1 wait for events again:
>
> diff --git a/src/xterm.c b/src/xterm.c
> index 1401693541c..0dc1a7a6870 100644
> --- a/src/xterm.c
> +++ b/src/xterm.c
> @@ -28524,7 +28620,7 @@ x_set_window_size_1 (struct frame *f, bool
> change_gravity,
> waiting creates an implicit X flush which might flicker with
> outdated contents in the frame. For child frames, the window
> manager is not a concern and it's better to finish quickly. */
> - if (FRAME_VISIBLE_P (f) && !FRAME_PARENT_FRAME (f))
> + if (FRAME_VISIBLE_P (f) /* && !FRAME_PARENT_FRAME (f) */)
> {
> /* The event may create delayed size change (delayed because we
> can't run Lisp code inside of a BLOCK_INPUT) which will be
>
> OR just removing optimization in EmacsFrameResize:
>
> diff --git a/src/widget.c b/src/widget.c
> index b843bca1fb9..68f1e37fc6e 100644
> --- a/src/widget.c
> +++ b/src/widget.c
> @@ -428,9 +428,9 @@ EmacsFrameResize (Widget widget)
> ew->core.width, ew->core.height,
> f->new_width, f->new_height);
>
> - if (FRAME_PIXEL_WIDTH (f) == ew->core.width
> - && FRAME_PIXEL_HEIGHT (f) == ew->core.height)
> - return;
> + /* if (FRAME_PIXEL_WIDTH (f) == ew->core.width */
> + /* && FRAME_PIXEL_HEIGHT (f) == ew->core.height) */
> + /* return; */
>
> change_frame_size (f, ew->core.width, ew->core.height,
> false, true, false);
>
> makes the test scenario result in expected text height (not cut off).
If the second change fixes the problem, then there's some factor at
work here which we don't understand. Because disabling optimization
in a case that's supposed to be a no-op cannot possibly fix anything.
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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Date: Wed, 20 May 2026 19:02:37 +0300
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Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are
unexpectedly displayed
To: martin rudalics <rudalics@HIDDEN>, Markus Triska <triska@HIDDEN>
References: <87jysz2z65.fsf@HIDDEN>
<20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> <87a4tu79eo.fsf@HIDDEN>
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From: Dmitry Gutov <dmitry@HIDDEN>
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Hi!
On 20/05/2026 12:01, martin rudalics via Bug reports for GNU Emacs, the
Swiss army knife of text editors wrote:
> >> Bisecting to find out which build first exhibits the behavior might
> >> allow to find out who's responsible.
> >
> > With bisecting, I've narrowed it down to commits between
> > dee5ca5acd330fcd4612ce585762ae1ee8c83831 (good) and
> > a6a3b32208c5763de20c874da1a0d8af47e4dd93 (bad).
> >
> > Of these, it seems like a6a3b32208c5763de20c874da1a0d8af47e4dd93 itself
> > could be a candidate to look at?
>
> Adding Dmitry to the recipients.
The change a6a3b32208 does seem to trigger the problem. More curiously,
reverting one of two different parts of it seems to fix it.
So either making x_set_window_size_1 wait for events again:
diff --git a/src/xterm.c b/src/xterm.c
index 1401693541c..0dc1a7a6870 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -28524,7 +28620,7 @@ x_set_window_size_1 (struct frame *f, bool
change_gravity,
waiting creates an implicit X flush which might flicker with
outdated contents in the frame. For child frames, the window
manager is not a concern and it's better to finish quickly. */
- if (FRAME_VISIBLE_P (f) && !FRAME_PARENT_FRAME (f))
+ if (FRAME_VISIBLE_P (f) /* && !FRAME_PARENT_FRAME (f) */)
{
/* The event may create delayed size change (delayed because we
can't run Lisp code inside of a BLOCK_INPUT) which will be
OR just removing optimization in EmacsFrameResize:
diff --git a/src/widget.c b/src/widget.c
index b843bca1fb9..68f1e37fc6e 100644
--- a/src/widget.c
+++ b/src/widget.c
@@ -428,9 +428,9 @@ EmacsFrameResize (Widget widget)
ew->core.width, ew->core.height,
f->new_width, f->new_height);
- if (FRAME_PIXEL_WIDTH (f) == ew->core.width
- && FRAME_PIXEL_HEIGHT (f) == ew->core.height)
- return;
+ /* if (FRAME_PIXEL_WIDTH (f) == ew->core.width */
+ /* && FRAME_PIXEL_HEIGHT (f) == ew->core.height) */
+ /* return; */
change_frame_size (f, ew->core.width, ew->core.height,
false, true, false);
makes the test scenario result in expected text height (not cut off).
Does that fix the scenario for you too?
Then it looks like we have a case when the saved dimensions are the same
as the ones saved in the widget (and apparently received in the event),
and yet we still need to resize? Maybe that forces a full redraw.
Another observation: when I do see the cut off rendering (which is most
of the time), it matches the window contents in the same scenario but
when the tool-bar present (then the text is cut off because it doesn't
fit). So maybe in the buggy scenario we render the frame with the
tool-bar, then remove it according to the value of tool-bar-mode, and
move the windows but do not redraw their contents.
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bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
Full text available.Received: (at 81077) by debbugs.gnu.org; 20 May 2026 12:08:25 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed May 20 08:08:25 2026 Received: from localhost ([127.0.0.1]:53830 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1wPfiq-0007Ct-7W for submit <at> debbugs.gnu.org; Wed, 20 May 2026 08:08:25 -0400 Received: from mail-244123.protonmail.ch ([109.224.244.123]:29551) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <pipcet@HIDDEN>) id 1wPfil-0007Bg-RM for 81077 <at> debbugs.gnu.org; Wed, 20 May 2026 08:08:21 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=protonmail3; t=1779278892; x=1779538092; bh=RwWV97/QiXAR385bDvYF9oVSHl6ivjw0L6BplWVi4E8=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID:BIMI-Selector; b=lVGn9YelpKI+uUFHzaG3c97bDEGQQH06dkRdpSklWP5FpD77qGWzDWuk+b8hb477t Aa9o35DwtcQSPMOFM1nedLKge/XvprQXkegYiEW6p85BZTZrApxsGH8wD8q5PKx2gO iP0WLn+OdmxNmROM6wpu5xrjcKEKgTh8RSUmM9t9DcwWGJ8bUZ0uwyK+oR7xSssLAC eFfUltmkNc4RM8Jn1q1RFnv7MAiBmRRURhm222PrFbGIULU1ZZ/Okyiap5Lr1AYNq5 B6y6qk1hHQ+dNFO5m8AAXUwAVjCYuqfh7mEpukkeu6H4CBHGB0ssJ49w66eb6tjH1Q qj53VsqaPiltQ== Date: Wed, 20 May 2026 12:06:59 +0000 To: Eli Zaretskii <eliz@HIDDEN> From: Pip Cet <pipcet@HIDDEN> Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed Message-ID: <875x4iffn8.fsf@HIDDEN> In-Reply-To: <86a4tu1fjm.fsf@HIDDEN> References: <87jysz2z65.fsf@HIDDEN> <86o6ib1jpl.fsf@HIDDEN> <875x4jidst.fsf@HIDDEN> <871pf6heo1.fsf@HIDDEN> <86a4tu1fjm.fsf@HIDDEN> Feedback-ID: 112775352:user:proton X-Pm-Message-ID: ddefdeac52960a62826b201204c1c620430ef36a MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Spam-Score: 0.3 (/) X-Debbugs-Envelope-To: 81077 Cc: rudalics@HIDDEN, 81077 <at> debbugs.gnu.org, triska@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) "Eli Zaretskii" <eliz@HIDDEN> writes: >> Date: Wed, 20 May 2026 04:45:11 +0000 >> From: Pip Cet <pipcet@HIDDEN> >> Cc: Eli Zaretskii <eliz@HIDDEN>, rudalics@HIDDEN, 81077 <at> debbugs.gnu.org >> >> "Markus Triska" <triska@HIDDEN> writes: >> >> I've looked at some backtraces for the problematic expose events, and >> the problem appears to be that we handle X events while opening the >> font: we should block_input around those, but the unblock_input would >> run the problematic code anyway. This is a known issue. > > Didn't Markus say that the problem happens not only with displaying > text? Then what happens when we open fonts cannot be the explanation, > at least not the the only one. I agree. The text-only version of this bug does go away here with the patch applied, and I did see backtraces indicating redisplay reentrancy (both because of Fassq in Ffont_get and because of unblock_input) which didn't look right. But martin said it didn't fix the issue for him, so we need to investigate further. If this is related to the precise timing of window manager activity, that might make things very difficult to reproduce. x11trace logs might be very helpful, though we probably need to correlate them with when we handle exposure events and whether we're already in redisplay code when do. Pip
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
Full text available.Received: (at 81077) by debbugs.gnu.org; 20 May 2026 11:33:52 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed May 20 07:33:52 2026 Received: from localhost ([127.0.0.1]:53663 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1wPfBP-0002ZS-JG for submit <at> debbugs.gnu.org; Wed, 20 May 2026 07:33:52 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54066) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1wPfBM-0002YT-DQ for 81077 <at> debbugs.gnu.org; Wed, 20 May 2026 07:33:49 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1wPfBG-0005aK-4V; Wed, 20 May 2026 07:33:42 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=7kUJRwA1PqULbmfvkkvbwuDV2Tezq07DI/kXnL8SNxA=; b=nxdiBr309b6O bYVWKQthDLBXndpbxiepJZWg95s56qioCtwSBH9NeAM7uEMMwdgQHxcBTyAfghldIGilzJKKGsLzk 1dUCRWnxRkKKAkugsq5NARf43P5RS12T6XqFQAelvLxmHJ7kg4ZpYZq13ITGmb3WC2y8P4/Zx+jeO TAVvsPYd2KVOhKx9OEltPsBlYolXr4hFTCg3bxKwxU7/2RjK9TR8f8CRyDx02bIFuiFLyGZoOfLrW q+Dpj8MK/dE50YND1HlFN03wft1Wnzsxqr5c+n38/fFLa18PvO+VJAMThexMF5UHH31JnLhkDazEZ 7JFSv7XtRmjiik/+IBP89Q==; Date: Wed, 20 May 2026 14:33:33 +0300 Message-Id: <86a4tu1fjm.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Pip Cet <pipcet@HIDDEN> In-Reply-To: <871pf6heo1.fsf@HIDDEN> (message from Pip Cet on Wed, 20 May 2026 04:45:11 +0000) Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed References: <87jysz2z65.fsf@HIDDEN> <86o6ib1jpl.fsf@HIDDEN> <875x4jidst.fsf@HIDDEN> <871pf6heo1.fsf@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 81077 Cc: rudalics@HIDDEN, 81077 <at> debbugs.gnu.org, triska@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > Date: Wed, 20 May 2026 04:45:11 +0000 > From: Pip Cet <pipcet@HIDDEN> > Cc: Eli Zaretskii <eliz@HIDDEN>, rudalics@HIDDEN, 81077 <at> debbugs.gnu.org > > "Markus Triska" <triska@HIDDEN> writes: > > I've looked at some backtraces for the problematic expose events, and > the problem appears to be that we handle X events while opening the > font: we should block_input around those, but the unblock_input would > run the problematic code anyway. This is a known issue. Didn't Markus say that the problem happens not only with displaying text? Then what happens when we open fonts cannot be the explanation, at least not the the only one.
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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from client.hidden.invalid by mail.gmx.net (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MeU0k-1wxrhC3gCC-00dmrY; Wed, 20 May 2026 11:01:42 +0200 Message-ID: <9ab986f0-ddf5-42b7-849a-1049e65bba37@HIDDEN> Date: Wed, 20 May 2026 11:01:41 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed To: Markus Triska <triska@HIDDEN> References: <87jysz2z65.fsf@HIDDEN> <20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> <87a4tu79eo.fsf@HIDDEN> Content-Language: en-US From: martin rudalics <rudalics@HIDDEN> In-Reply-To: <87a4tu79eo.fsf@HIDDEN> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:69lwAc41OUMR7aT0pRrZHGtbXaMhWBzBxcr//uuqZAqAwfvu598 BwS2id+J/AFvSx6AtpnxuI4SkhWsuPR7iVI0O7lJhLM79WxFV+Pg5t3zZCUCiZnFO77zacf uszM+1BJf/jd9BvtcHIlSLPdT19BbolMdb2sVsmG9sSjGtZXQ6Yj5dPAvLftbdD2A131ZO0 6y26h+/37NFHLe0mbohOQ== X-Spam-Flag: NO UI-OutboundReport: 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kxTNz5U+VHr0AoUQhgDYBI4XjJrcvGddtvZNgez7e23aZfKf2P9g+lhzu7rGlSXKMx5DF1+ee iBry6Fknw1ZOuwPsFk= Received-SPF: pass client-ip=212.227.15.18; envelope-from=rudalics@HIDDEN; helo=mout.gmx.net X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: submit Cc: Dmitry Gutov <dmitry@HIDDEN>, bug-gnu-emacs@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) >> Bisecting to find out which build first exhibits the behavior might >> allow to find out who's responsible. > > With bisecting, I've narrowed it down to commits between > dee5ca5acd330fcd4612ce585762ae1ee8c83831 (good) and > a6a3b32208c5763de20c874da1a0d8af47e4dd93 (bad). > > Of these, it seems like a6a3b32208c5763de20c874da1a0d8af47e4dd93 itself > could be a candidate to look at? Adding Dmitry to the recipients. martin
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
Full text available.Received: (at submit) by debbugs.gnu.org; 20 May 2026 08:50:10 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed May 20 04:50:10 2026 Received: from localhost ([127.0.0.1]:52612 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1wPccz-0004QZ-HP for submit <at> debbugs.gnu.org; Wed, 20 May 2026 04:50:10 -0400 Received: from lists1p.gnu.org ([2001:470:142::17]:33126) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <triska@HIDDEN>) id 1wPccx-0004N9-86 for submit <at> debbugs.gnu.org; Wed, 20 May 2026 04:50:08 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <triska@HIDDEN>) id 1wPccV-0008KZ-Jx for bug-gnu-emacs@HIDDEN; Wed, 20 May 2026 04:49:48 -0400 Received: from [78.47.144.35] (helo=metalevel.at) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <triska@HIDDEN>) id 1wPccT-0008DR-Q8 for bug-gnu-emacs@HIDDEN; Wed, 20 May 2026 04:49:39 -0400 Received: by metalevel.at (Postfix, from userid 1000) id 89C459C7A3; Wed, 20 May 2026 10:49:35 +0200 (CEST) From: Markus Triska <triska@HIDDEN> To: martin rudalics <rudalics@HIDDEN> Subject: Re: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed References: <87jysz2z65.fsf@HIDDEN> <20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> Date: Wed, 20 May 2026 10:49:35 +0200 In-Reply-To: <20e38fce-09a7-499c-b695-8b22dfd4afd3@HIDDEN> (martin rudalics's message of "Wed, 20 May 2026 10:00:29 +0200") Message-ID: <87a4tu79eo.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Host-Lookup-Failed: Reverse DNS lookup failed for 78.47.144.35 (failed) Received-SPF: none client-ip=78.47.144.35; envelope-from=triska@HIDDEN; helo=metalevel.at X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: submit Cc: bug-gnu-emacs@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) martin rudalics <rudalics@HIDDEN> writes: > Bisecting to find out which build first exhibits the behavior might > allow to find out who's responsible. With bisecting, I've narrowed it down to commits between dee5ca5acd330fcd4612ce585762ae1ee8c83831 (good) and a6a3b32208c5763de20c874da1a0d8af47e4dd93 (bad). Of these, it seems like a6a3b32208c5763de20c874da1a0d8af47e4dd93 itself could be a candidate to look at? Thank you and all the best, Markus
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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Content-Transfer-Encoding:cc:content-transfer-encoding: content-type:date:from:message-id:mime-version:reply-to:subject: to; b=BHhRpWfoNUME9C0/zz8QCPbB0hmNFG6Y0ohd7yGd/ishaxJP1Knr9Od0wdljKdoO r3OGevacVh9s/39eBwR6HzrZP1TTdQTfaGTxVTUPbtfUtQxyFsM86RAlyylJghBRx dQpeJVPMlC95Defcu3jQYZmp9RPQZdBXPGhjuHTB10ChbBGsHiuHXT7VksmJ2Woid EMZSbV9Q+ZYsCPZUrboGMNFeKsFFuR7tvWz/HDzfwUVhE/ATe3vE+ZYoJlhRBEobH rxg7gWxLcFmXWFXHpDZO2+rGvBaCo9LR2QHGNQFH+D4IDouZ2j80Fy0UhT8myspR8 qQ7vAYSAiwF0/YeXfw== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from client.hidden.invalid by mail.gmx.net (mrgmx005 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MN5eR-1wflpT3wMX-00Xexf; Wed, 20 May 2026 10:00:47 +0200 Message-ID: <9db7718e-8b0f-42b5-8b60-0d66245d95fb@HIDDEN> Date: Wed, 20 May 2026 10:00:45 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed To: Pip Cet <pipcet@HIDDEN>, Markus Triska <triska@HIDDEN> References: <87jysz2z65.fsf@HIDDEN> <86o6ib1jpl.fsf@HIDDEN> <875x4jidst.fsf@HIDDEN> <871pf6heo1.fsf@HIDDEN> Content-Language: en-US From: martin rudalics <rudalics@HIDDEN> In-Reply-To: <871pf6heo1.fsf@HIDDEN> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:9lvNuhs+ncxfMCQmmt58N6juQF27EFFR7WvKKIRXiuuxqTqs6HQ J3RYuFbglXvj0P3dpO1+lGZD92gMjYZcbB4Ku/S1OAaPy/Aqam6WrfXrxo9cXBrv5PCc1Nd XuckYDBOMG1sszezwyYlBSpotqzoK5WDt3g1IO+fz2vsgbp7t08ezb/J+ON5UXg32L+f27z VWo4kM2UHiY4vZc5b2J0A== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:mMEvStzr78M=;XiQKMGWOz08S5rYCKCkRM7X9OdS jTxr0d5pss0IXxfGQInRkPSBA2JdbMptn603LDoYmBwtQ87ArzNlnOwtGUZ9TiT0AuAvY9xWr UgIeSrXtWcDIWW+eWImtQkVn1QRWcy5OLgK+GXZkP5dcvdnTTrJOdhobsk/trvnskwtweZHOp YY1WSVvq25gJ4kZrHqqpTzPDmgywVwA9KpgQtlr3/i+H9BXP5yeKnRl0kTfguQWC0txI+WucJ Vy821GFEgPaG1UqwImdmfJJOsMh38yr9P2tnAmCK32O0KMd9GFiPZ+XbElZ4y4aP9RrPjRHrP DngjR3DtkKcEOC3Znywlgi1VkiyKV9U8HW+NvjEQwtDw5mq27VkQidhcseioyTLSjauK3Un08 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<https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.7 (-) > Can you try this patch to see whether I'm on the right track here? The patch does not fix the behavior here. martin
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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client-ip=212.227.15.19; envelope-from=rudalics@HIDDEN; helo=mout.gmx.net X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) > To reproduce this issue, please put the following code in a file called > frameglitch.el, and then invoke Emacs with: > > $ emacs -Q -l frameglitch.el > > The expectation is that "Hello!" is fully visibly displayed. However, > sometimes but not always, only an upper part of the letters is visible. > > Press a key to return to regular Emacs interaction. You can do: > > M-x eval-buffer RET > > on frameglitch.el as often as you like, and sometimes "Hello!" is fully > visible, and sometimes not. > > The example consistently works exactly as expected for example in Emacs > versions 26.1, 29.1 and 30.2, where "Hello!" is always fully visible. Reproducible here with Lucid builds beginning somewhere with Emacs 30. The GTK3 build does not truncate. But here the top-level GTK frame gets resized, probably due to the (set-face-attribute 'default frame :height 12) while the top-level Lucid frame does not get resized. This should mean that 'frame' is nil with GTK and be the new child frame with Lucid when that form is evaluated. And the Lucid build does not truncate text with (setq frame-inhibit-implied-resize t) In either case setting a child frame's default face height and adjusting its size right after making it will be hard to digest. Bisecting to find out which build first exhibits the behavior might allow to find out who's responsible. martin
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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Date: Wed, 20 May 2026 04:45:11 +0000
To: Markus Triska <triska@HIDDEN>
From: Pip Cet <pipcet@HIDDEN>
Subject: Re: bug#81077: 31.0.60;
Sometimes only upper parts of text are unexpectedly displayed
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"Markus Triska" <triska@HIDDEN> writes:
> Thank you a lot for looking into this!
>
> Eli Zaretskii <eliz@HIDDEN> writes:
>
>> Isn't this the same problem with displaying text as in bug#81012?
>
> This is a different problem: It also occurs with Pip's patch applied,
> which reliably addresses #81012 on my setup. Moreover, this issue
> sometimes occurs and sometimes not, whereas #81012 occurs consistently
> and also in other Emacs versions such as Emacs 30.2, whereas the present
> issue does not arise in Emacs 30.2 and also not in 29.1 nor in 26.1.
>
>> can you show a screenshot?
>
> Yes of course, please find a screenshot showing the issue here:
>
> https://www.metalevel.at/ei/frameglitch.png
>
> For convenience, frameglitch.el is also available from:
>
> https://www.metalevel.at/ei/frameglitch.el
>
> Can anybody else reproduce this? I would greatly appreciate your input.
I can reproduce this: most of the time, the "Hello!" is
intact. Sometimes, only the top 21 rows are visible; sometimes, the new
frame contains just the letters "l" and "o", each on a line of its own.
I've looked at some backtraces for the problematic expose events, and
the problem appears to be that we handle X events while opening the
font: we should block_input around those, but the unblock_input would
run the problematic code anyway. This is a known issue.
Can you try this patch to see whether I'm on the right track here?
Thanks!
Pip
diff --git a/src/font.c b/src/font.c
index fed90084219..100adbb529a 100644
--- a/src/font.c
+++ b/src/font.c
@@ -4250,7 +4250,7 @@ DEFUN ("font-get", Ffont_get, Sfont_get, 2, 2, 0,
return font_style_symbolic (font, idx, 0);
if (idx >=3D 0 && idx < FONT_EXTRA_INDEX)
return AREF (font, idx);
- val =3D Fassq (key, AREF (font, FONT_EXTRA_INDEX));
+ val =3D assq_no_quit (key, AREF (font, FONT_EXTRA_INDEX));
if (NILP (val) && FONT_OBJECT_P (font))
{
struct font *fontp =3D XFONT_OBJECT (font);
diff --git a/src/keyboard.c b/src/keyboard.c
index 2188d58cd3d..40f7574863a 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -8385,12 +8385,7 @@ process_pending_signals (void)
unblock_input_to (int level)
{
interrupt_input_blocked =3D level;
- if (level =3D=3D 0)
- {
- if (pending_signals && !fatal_error_in_progress)
-=09process_pending_signals ();
- }
- else if (level < 0)
+ if (level < 0)
emacs_abort ();
}
=20
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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From: Markus Triska <triska@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#81077: 31.0.60;
Sometimes only upper parts of text are unexpectedly displayed
References: <87jysz2z65.fsf@HIDDEN> <86o6ib1jpl.fsf@HIDDEN>
<875x4jidst.fsf@HIDDEN>
Date: Tue, 19 May 2026 20:48:30 +0200
In-Reply-To: <875x4jidst.fsf@HIDDEN> (Markus Triska's message of "Tue,
19 May 2026 18:06:58 +0200")
Message-ID: <87h5o3ck1t.fsf@HIDDEN>
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Content preview: One additional datapoint: The issue is *not* limited to
displaying
text. A sample program that demonstrates this issue for a PBM image is
available
from (and also follows below): https://www.metalevel.at/ei/squareglitch.el
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One additional datapoint: The issue is *not* limited to displaying text.
A sample program that demonstrates this issue for a PBM image is
available from (and also follows below):
https://www.metalevel.at/ei/squareglitch.el
When invoked as:
$ emacs -Q -l squareglitch.el
it always displays a 200x200 black square with e.g. Emacs 30.2.
In contrast, with e90cafc2886dec40d241db16cc5cf89d44d34502 from today, I
unexpectedly get results such as shown in:
https://www.metalevel.at/ei/squareglitch.png
The contents of squareglitch.el follow below.
Thank you and all the best,
Markus
;; -*- lexical-binding: t; -*-
(defun glitching-square (x y)
(tool-bar-mode -1)
(menu-bar-mode -1)
(let* ((width 200)
(height 200)
(frame (make-frame `((parent-frame . ,(selected-frame))
(minibuffer . nil)
(left . ,x)
(top . ,y)
(internal-border-width . 0)
(vertical-scroll-bars . nil)
(left-fringe . 0)
(right-fringe . 0)
(no-special-glyphs . t) ; see #52929
;; not setting the width/height causes
;; mode line flickering (see #52666)
(width . (text-pixels . ,width))
(height . (text-pixels . ,height)))))
(buf (get-buffer-create "showing the text")))
(set-face-attribute 'default frame :height 12)
(set-frame-width frame width nil t)
(set-frame-height frame height nil t)
(with-selected-frame frame
(switch-to-buffer buf)
(erase-buffer)
(let* ((line (make-string width ?1))
(data (format "P1\n%s %s\n%s" width height
(mapconcat (lambda (x)
line)
(make-string height ?.) "\n"))))
(insert-image `(image :type pbm
:data ,data
:ascent center)
"t"))
(setq cursor-type nil
mode-line-format nil))
frame))
(let ((f (glitching-square 0 0)))
(read-key)
(delete-frame f))
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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From: Markus Triska <triska@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
Subject: Re: bug#81077: 31.0.60;
Sometimes only upper parts of text are unexpectedly displayed
References: <87jysz2z65.fsf@HIDDEN> <86o6ib1jpl.fsf@HIDDEN>
Date: Tue, 19 May 2026 18:06:58 +0200
In-Reply-To: <86o6ib1jpl.fsf@HIDDEN> (Eli Zaretskii's message of "Tue, 19 May
2026 18:51:18 +0300")
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Content preview: Thank you a lot for looking into this! Eli Zaretskii
<eliz@HIDDEN>
writes: > Isn't this the same problem with displaying text as in bug#81012?
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Thank you a lot for looking into this!
Eli Zaretskii <eliz@HIDDEN> writes:
> Isn't this the same problem with displaying text as in bug#81012?
This is a different problem: It also occurs with Pip's patch applied,
which reliably addresses #81012 on my setup. Moreover, this issue
sometimes occurs and sometimes not, whereas #81012 occurs consistently
and also in other Emacs versions such as Emacs 30.2, whereas the present
issue does not arise in Emacs 30.2 and also not in 29.1 nor in 26.1.
> can you show a screenshot?
Yes of course, please find a screenshot showing the issue here:
https://www.metalevel.at/ei/frameglitch.png
For convenience, frameglitch.el is also available from:
https://www.metalevel.at/ei/frameglitch.el
Can anybody else reproduce this? I would greatly appreciate your input.
Thank you and all the best,
Markus
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
Full text available.Received: (at 81077) by debbugs.gnu.org; 19 May 2026 15:51:33 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue May 19 11:51:33 2026 Received: from localhost ([127.0.0.1]:45610 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1wPMjE-0000TR-NB for submit <at> debbugs.gnu.org; Tue, 19 May 2026 11:51:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:44868) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1wPMjC-0000Sy-PN for 81077 <at> debbugs.gnu.org; Tue, 19 May 2026 11:51:31 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1wPMj5-0008Dz-UE; Tue, 19 May 2026 11:51:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=IkNGoyuVJ92IB1u92EGv1RInY05vFPvgrvBDu3EEVvk=; b=Xs2hiHmMSrxI 11sGzd8ao0k/e8U8oNdmBzqGbqtnIaO5XQVP5kuSgoBrzqmWmLtG2RYWxnehu6sxWq0nm3gXMsBG8 Al1DtOAG7hEHl6rlR8gAeMNnY5w82QTeQwCXO4svsIK7E3/F2WTQn+2zXyJPAvmSGPC/NcYOVrhmE wQRscD3Lm84vB7fAmQk2S8fUE7trDs3EOAU7rxLbp4X+qvS9mKOwyJTdIRl4MxLi06ARyVad0PGC2 reu8qxj0iPsAJDGeABLC2RUXarAWYPn2E3mnd+lL+fuoQVwVaZELiBZSi+3qGmDBWslJ5hb9bkWSB /uxlrswNu1E5IRP1sZEBPA==; Date: Tue, 19 May 2026 18:51:18 +0300 Message-Id: <86o6ib1jpl.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Markus Triska <triska@HIDDEN> In-Reply-To: <87jysz2z65.fsf@HIDDEN> (message from Markus Triska on Tue, 19 May 2026 17:32:02 +0200) Subject: Re: bug#81077: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed References: <87jysz2z65.fsf@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 81077 Cc: rudalics@HIDDEN, 81077 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > Cc: martin rudalics <rudalics@HIDDEN> > From: Markus Triska <triska@HIDDEN> > Date: Tue, 19 May 2026 17:32:02 +0200 > > To reproduce this issue, please put the following code in a file called > frameglitch.el, and then invoke Emacs with: > > $ emacs -Q -l frameglitch.el > > The expectation is that "Hello!" is fully visibly displayed. However, > sometimes but not always, only an upper part of the letters is visible. > > Press a key to return to regular Emacs interaction. You can do: > > M-x eval-buffer RET > > on frameglitch.el as often as you like, and sometimes "Hello!" is fully > visible, and sometimes not. > > The example consistently works exactly as expected for example in Emacs > versions 26.1, 29.1 and 30.2, where "Hello!" is always fully visible. > > The contents of frameglitch.el follow below. > > Please let me know any time if anything else is needed. Isn't this the same problem with displaying text as in bug#81012? If not, maybe I don't understand the problem -- can you show a screenshot? Granted, this is not reproducible on my system.
bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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From: Markus Triska <triska@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: 31.0.60; Sometimes only upper parts of text are unexpectedly displayed
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To reproduce this issue, please put the following code in a file called
frameglitch.el, and then invoke Emacs with:
$ emacs -Q -l frameglitch.el
The expectation is that "Hello!" is fully visibly displayed. However,
sometimes but not always, only an upper part of the letters is visible.
Press a key to return to regular Emacs interaction. You can do:
M-x eval-buffer RET
on frameglitch.el as often as you like, and sometimes "Hello!" is fully
visible, and sometimes not.
The example consistently works exactly as expected for example in Emacs
versions 26.1, 29.1 and 30.2, where "Hello!" is always fully visible.
The contents of frameglitch.el follow below.
Please let me know any time if anything else is needed.
Thank you and all the best,
Markus
;; -*- lexical-binding: t; -*-
(defun glitching-frame (x y)
(tool-bar-mode -1)
(menu-bar-mode -1)
(let* ((width 200)
(height 100)
(frame (make-frame `((parent-frame . ,(selected-frame))
(minibuffer . nil)
(left . ,x)
(top . ,y)
(internal-border-width . 0)
(vertical-scroll-bars . nil)
(left-fringe . 0)
(right-fringe . 0)
(no-special-glyphs . t) ; see #52929
;; not setting the width/height causes
;; mode line flickering (see #52666)
(width . (text-pixels . ,width))
(height . (text-pixels . ,height)))))
(buf (get-buffer-create "showing the text")))
(set-face-attribute 'default frame :height 12)
(set-frame-width frame width nil t)
(set-frame-height frame height nil t)
(with-selected-frame frame
(switch-to-buffer buf)
(erase-buffer)
(insert (propertize "Hello!" 'face '(:height 300)))
(setq cursor-type nil
mode-line-format nil))
frame))
(let ((f (glitching-frame 0 0)))
(read-key)
(delete-frame f))
In GNU Emacs 31.0.60 (build 1, x86_64-pc-linux-gnu, X toolkit, Xaw
scroll bars) of 2026-05-19 built on notebook
Repository revision: e90cafc2886dec40d241db16cc5cf89d44d34502
Repository branch: emacs-31
Windowing system distributor 'The X.Org Foundation', version 11.0.12101016
System Description: Debian GNU/Linux 13 (trixie)
Configured using:
'configure --without-cairo --with-x-toolkit=lucid
--with-xpm=ifavailable --with-gif=ifavailable --with-tiff=ifavailable
--with-gnutls=ifavailable'
Configured features:
FREETYPE GLIB GMP GSETTINGS HARFBUZZ JPEG LIBXML2 MODULES NOTIFY INOTIFY
PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS WEBP X11
XDBE XFT XIM XPM LUCID ZLIB
Important settings:
value of $LANG: en_US.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8-unix
Markus Triska <triska@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#81077; Package emacs.
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