GNU bug report logs - #60356
30.0.50; individual frame loses keyboard focus, focus cannot be restored

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: git <at> sphalerite.org
To: bug-gnu-emacs <at> gnu.org
Subject: 30.0.50; individual frame loses keyboard focus, focus cannot be
 restored
Date: Tue, 27 Dec 2022 13:19:44 +0100

The exact action leading to this bug is not clear to me. It seems to be
related to lsp-mode though -- I've not observed it happening without
lsp-mode.

The symptom is that a single frame will no longer accept keyboard input,
and will visually indicate that it is not focused (outline rectangular
cursor where I'd usually expect a solid rectangular cursor). Mouse input
still works, and other frames still accept keyboard input as normal.

I'd be glad if anyone could point out ways to further debug this issue.
I'm also in #emacs:matrix.org (@linus:schreibt.jetzt) in case
fast-turnaround communication would be helpful :)


In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.34, cairo version 1.16.0)
Repository revision: ad5a67996ddf23df904c09165475759e2e0a68b1
Repository branch: master
System Description: NixOS 22.11 (Raccoon)

Configured using:
 'configure
 --prefix=/nix/store/nj8sffdvjjxqadnv0j46ssj73q1k7z61-emacs-pgtk-20221221.0
 --disable-build-details --with-modules --with-x=no --with-xpm=no
 --with-jpeg=no --with-png=no --with-gif=no --with-tiff=no
 --with-native-compilation --with-pgtk'

Configured features:
CAIRO DBUS FREETYPE GLIB GMP GNUTLS GSETTINGS HARFBUZZ JSON LIBSELINUX
LIBSYSTEMD LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PGTK
SECCOMP SOUND SQLITE3 THREADS TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XIM
GTK3 ZLIB

Important settings:
  value of $EMACSLOADPATH: 
  value of $EMACSNATIVELOADPATH: /nix/store/fpz84pkf3j4cl2xr9qp2a5wszcdw97dl-emacs-packages-deps/share/emacs/native-lisp::
  value of $LANG: en_GB.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Nix

Minor modes in effect:
  direnv-mode: t
  counsel-mode: t
  global-git-commit-mode: t
  magit-auto-revert-mode: t
  shell-dirtrack-mode: t
  evil-mode: t
  evil-local-mode: t
  windmove-mode: t
  global-undo-tree-mode: t
  undo-tree-mode: t
  global-whitespace-mode: t
  tooltip-mode: t
  global-eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  buffer-read-only: t
  line-number-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
/home/linus/.nix-profile/share/emacs/site-lisp/site-start hides /nix/store/fpz84pkf3j4cl2xr9qp2a5wszcdw97dl-emacs-packages-deps/share/emacs/site-lisp/site-start
/home/linus/.nix-profile/share/emacs/site-lisp/site-start hides /nix/store/nj8sffdvjjxqadnv0j46ssj73q1k7z61-emacs-pgtk-20221221.0/share/emacs/site-lisp/site-start
/nix/store/fpz84pkf3j4cl2xr9qp2a5wszcdw97dl-emacs-packages-deps/share/emacs/site-lisp/elpa/transient-20221202.1727/transient hides /nix/store/nj8sffdvjjxqadnv0j46ssj73q1k7z61-emacs-pgtk-20221221.0/share/emacs/30.0.50/lisp/transient
/nix/store/fpz84pkf3j4cl2xr9qp2a5wszcdw97dl-emacs-packages-deps/share/emacs/site-lisp/elpa/nadvice-0.3/nadvice hides /nix/store/nj8sffdvjjxqadnv0j46ssj73q1k7z61-emacs-pgtk-20221221.0/share/emacs/30.0.50/lisp/emacs-lisp/nadvice
/nix/store/fpz84pkf3j4cl2xr9qp2a5wszcdw97dl-emacs-packages-deps/share/emacs/site-lisp/elpa/let-alist-1.0.6/let-alist hides /nix/store/nj8sffdvjjxqadnv0j46ssj73q1k7z61-emacs-pgtk-20221221.0/share/emacs/30.0.50/lisp/emacs-lisp/let-alist
/nix/store/fpz84pkf3j4cl2xr9qp2a5wszcdw97dl-emacs-packages-deps/share/emacs/site-lisp/elpa/eldoc-1.13.0/eldoc hides /nix/store/nj8sffdvjjxqadnv0j46ssj73q1k7z61-emacs-pgtk-20221221.0/share/emacs/30.0.50/lisp/emacs-lisp/eldoc

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ghub-autoloads treepy-autoloads flycheck-autoloads let-alist-autoloads
pkg-info-autoloads f-autoloads s-autoloads evil-autoloads
goto-chg-autoloads epl-autoloads eldoc-autoloads docbook-autoloads
direnv-autoloads dhall-mode-autoloads reformatter-autoloads
dash-autoloads counsel-autoloads swiper-autoloads ivy-autoloads
company-autoloads closql-autoloads emacsql-sqlite-autoloads
emacsql-autoloads info compat-autoloads nadvice-autoloads
async-autoloads package browse-url url url-proxy url-privacy url-expand
url-methods url-history url-cookie generate-lisp-file url-domsuf
url-util mailcap url-handlers url-parse auth-source cl-seq eieio
eieio-core cl-macs password-cache json subr-x map byte-opt gv bytecomp
byte-compile url-vars cl-loaddefs cl-lib rmc iso-transl tooltip cconv
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epa-hook jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button
loaddefs theme-loaddefs faces cus-face macroexp files window
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget keymap hashtable-print-readable backquote threads dbusbind
inotify dynamic-setting system-font-setting font-render-setting cairo
gtk pgtk multi-tty make-network-process native-compile emacs)

Memory information:
((conses 16 525894 67567)
 (symbols 48 39360 0)
 (strings 32 136284 9664)
 (string-bytes 1 4697353)
 (vectors 16 88803)
 (vector-slots 8 1674860 55920)
 (floats 8 533 536)
 (intervals 56 4681 681)
 (buffers 984 37))

Message #8 received at 60356 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: git <at> sphalerite.org
Cc: 60356 <at> debbugs.gnu.org
Subject: Re: bug#60356: 30.0.50;
 individual frame loses keyboard focus, focus cannot be restored
Date: Tue, 27 Dec 2022 18:50:46 +0200

> From: git <at> sphalerite.org
> Date: Tue, 27 Dec 2022 13:19:44 +0100
> 
> 
> The exact action leading to this bug is not clear to me. It seems to be
> related to lsp-mode though -- I've not observed it happening without
> lsp-mode.
> 
> The symptom is that a single frame will no longer accept keyboard input,
> and will visually indicate that it is not focused (outline rectangular
> cursor where I'd usually expect a solid rectangular cursor). Mouse input
> still works, and other frames still accept keyboard input as normal.
> 
> I'd be glad if anyone could point out ways to further debug this issue.
> I'm also in #emacs:matrix.org (@linus:schreibt.jetzt) in case
> fast-turnaround communication would be helpful :)

If you attach a debugger to Emacs in that state, and type

  (gdb) thread apply all bt

what do you get?  Please post here everything that GDB prints when you
do that.

Thanks.

Message #11 received at 60356 <at> debbugs.gnu.org (full text, mbox):

From: Po Lu <luangruo <at> yahoo.com>
To: git <at> sphalerite.org
Cc: 60356 <at> debbugs.gnu.org
Subject: Re: bug#60356: 30.0.50; individual frame loses keyboard focus,
 focus cannot be restored
Date: Thu, 29 Dec 2022 07:57:08 +0800

git <at> sphalerite.org writes:

> The exact action leading to this bug is not clear to me. It seems to be
> related to lsp-mode though -- I've not observed it happening without
> lsp-mode.
>
> The symptom is that a single frame will no longer accept keyboard input,
> and will visually indicate that it is not focused (outline rectangular
> cursor where I'd usually expect a solid rectangular cursor). Mouse input
> still works, and other frames still accept keyboard input as normal.
>
> I'd be glad if anyone could point out ways to further debug this issue.
> I'm also in #emacs:matrix.org (@linus:schreibt.jetzt) in case
> fast-turnaround communication would be helpful :)

Can you reliably reproduce this issue?

If you can, please add some instrumentation to x_new_focus_frame, like
this:

diff --git a/src/xterm.c b/src/xterm.c
index 1eef8e7a724..cda2897e013 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -11695,6 +11695,9 @@ x_new_focus_frame (struct x_display_info *dpyinfo, struct frame *frame)
     }
 #endif
 
+  fprintf (stderr, "x_new_focus_frame: switching focus to"
+	   " %s\n", SSDATA (frame->name));
+
   if (frame != dpyinfo->x_focus_frame)
     {
       /* Set this before calling other routines, so that they see

and see what is printed out when you try to focus the frame that does
not accept input.  Thanks.

Message #14 received at 60356 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Linus Heckemann <git <at> sphalerite.org>
Cc: 60356 <at> debbugs.gnu.org
Subject: Re: bug#60356: 30.0.50; individual frame loses keyboard focus,
 focus cannot be restored
Date: Tue, 03 Jan 2023 15:32:55 +0200

> From: Linus Heckemann <git <at> sphalerite.org>
> Cc: 60356 <at> debbugs.gnu.org
> Date: Tue, 03 Jan 2023 14:11:32 +0100
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> >> I'd be glad if anyone could point out ways to further debug this issue.
> >> I'm also in #emacs:matrix.org (@linus:schreibt.jetzt) in case
> >> fast-turnaround communication would be helpful :)
> >
> > If you attach a debugger to Emacs in that state, and type
> >
> >   (gdb) thread apply all bt
> >
> > what do you get?  Please post here everything that GDB prints when you
> > do that.
> 
> Thread 1 (Thread 0x7f923ad21000 (LWP 19849) "emacs"):
> #0  0x00007f923c305151 in pselect () from /nix/store/4nlgxhb09sdr51nc9hdm8az5b08vzkgx-glibc-2.35-163/lib/libc.so.6
> #1  0x0000000000626b92 in really_call_select ()
> #2  0x000000000062731f in thread_select ()
> #3  0x0000000000649a51 in xg_select ()
> #4  0x00000000006005d3 in wait_reading_process_output ()
> #5  0x0000000000435846 in sit_for ()
> #6  0x0000000000524532 in read_char ()
> #7  0x0000000000524b30 in read_key_sequence ()
> #8  0x00000000005268b1 in command_loop_1 ()
> #9  0x000000000059f98f in internal_condition_case ()
> #10 0x0000000000511d86 in command_loop_2 ()
> #11 0x000000000059f8f3 in internal_catch ()
> #12 0x0000000000511d19 in command_loop ()
> #13 0x00000000005165ba in recursive_edit_1 ()
> #14 0x0000000000516937 in Frecursive_edit ()
> #15 0x000000000042abda in main ()

This says Emacs is waiting for input.

So if you type and that has no effect, perhaps the problem really is
that some wrong/non-existent frame has input focus?

Message #17 received at 60356 <at> debbugs.gnu.org (full text, mbox):

From: Linus Heckemann <git <at> sphalerite.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 60356 <at> debbugs.gnu.org
Subject: Re: bug#60356: 30.0.50; individual frame loses keyboard focus,
 focus cannot be restored
Date: Tue, 03 Jan 2023 14:11:32 +0100

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: git <at> sphalerite.org
>> Date: Tue, 27 Dec 2022 13:19:44 +0100
>> 
>> 
>> The exact action leading to this bug is not clear to me. It seems to be
>> related to lsp-mode though -- I've not observed it happening without
>> lsp-mode.
>> 
>> The symptom is that a single frame will no longer accept keyboard input,
>> and will visually indicate that it is not focused (outline rectangular
>> cursor where I'd usually expect a solid rectangular cursor). Mouse input
>> still works, and other frames still accept keyboard input as normal.
>> 
>> I'd be glad if anyone could point out ways to further debug this issue.
>> I'm also in #emacs:matrix.org (@linus:schreibt.jetzt) in case
>> fast-turnaround communication would be helpful :)
>
> If you attach a debugger to Emacs in that state, and type
>
>   (gdb) thread apply all bt
>
> what do you get?  Please post here everything that GDB prints when you
> do that.
>
> Thanks.

0x00007f923c305151 in pselect () from /nix/store/4nlgxhb09sdr51nc9hdm8az5b08vzkgx-glibc-2.35-163/lib/libc.so.6
(gdb) thread apply all bt

Thread 3 (Thread 0x7f9223fff640 (LWP 19853) "gdbus"):
#0  0x00007f923c3026c9 in poll () from /nix/store/4nlgxhb09sdr51nc9hdm8az5b08vzkgx-glibc-2.35-163/lib/libc.so.6
#1  0x00007f923ee61c26 in g_main_context_iterate.constprop () from /nix/store/lrvvvkyakljgq3zvpzdwd20cm5hvwy3a-glib-2.74.1/lib/libglib-2.0.so.0
#2  0x00007f923ee61f73 in g_main_loop_run () from /nix/store/lrvvvkyakljgq3zvpzdwd20cm5hvwy3a-glib-2.74.1/lib/libglib-2.0.so.0
#3  0x00007f923f0c7216 in gdbus_shared_thread_func () from /nix/store/lrvvvkyakljgq3zvpzdwd20cm5hvwy3a-glib-2.74.1/lib/libgio-2.0.so.0
#4  0x00007f923ee8c8cd in g_thread_proxy () from /nix/store/lrvvvkyakljgq3zvpzdwd20cm5hvwy3a-glib-2.74.1/lib/libglib-2.0.so.0
#5  0x00007f923c288e86 in start_thread () from /nix/store/4nlgxhb09sdr51nc9hdm8az5b08vzkgx-glibc-2.35-163/lib/libc.so.6
#6  0x00007f923c30fc60 in clone3 () from /nix/store/4nlgxhb09sdr51nc9hdm8az5b08vzkgx-glibc-2.35-163/lib/libc.so.6

Thread 2 (Thread 0x7f922970b640 (LWP 19851) "gmain"):
#0  0x00007f923c3026c9 in poll () from /nix/store/4nlgxhb09sdr51nc9hdm8az5b08vzkgx-glibc-2.35-163/lib/libc.so.6
#1  0x00007f923ee61c26 in g_main_context_iterate.constprop () from /nix/store/lrvvvkyakljgq3zvpzdwd20cm5hvwy3a-glib-2.74.1/lib/libglib-2.0.so.0
#2  0x00007f923ee61d3f in g_main_context_iteration () from /nix/store/lrvvvkyakljgq3zvpzdwd20cm5hvwy3a-glib-2.74.1/lib/libglib-2.0.so.0
#3  0x00007f923ee61d91 in glib_worker_main () from /nix/store/lrvvvkyakljgq3zvpzdwd20cm5hvwy3a-glib-2.74.1/lib/libglib-2.0.so.0
#4  0x00007f923ee8c8cd in g_thread_proxy () from /nix/store/lrvvvkyakljgq3zvpzdwd20cm5hvwy3a-glib-2.74.1/lib/libglib-2.0.so.0
#5  0x00007f923c288e86 in start_thread () from /nix/store/4nlgxhb09sdr51nc9hdm8az5b08vzkgx-glibc-2.35-163/lib/libc.so.6
#6  0x00007f923c30fc60 in clone3 () from /nix/store/4nlgxhb09sdr51nc9hdm8az5b08vzkgx-glibc-2.35-163/lib/libc.so.6

Thread 1 (Thread 0x7f923ad21000 (LWP 19849) "emacs"):
#0  0x00007f923c305151 in pselect () from /nix/store/4nlgxhb09sdr51nc9hdm8az5b08vzkgx-glibc-2.35-163/lib/libc.so.6
#1  0x0000000000626b92 in really_call_select ()
#2  0x000000000062731f in thread_select ()
#3  0x0000000000649a51 in xg_select ()
#4  0x00000000006005d3 in wait_reading_process_output ()
#5  0x0000000000435846 in sit_for ()
#6  0x0000000000524532 in read_char ()
#7  0x0000000000524b30 in read_key_sequence ()
#8  0x00000000005268b1 in command_loop_1 ()
#9  0x000000000059f98f in internal_condition_case ()
#10 0x0000000000511d86 in command_loop_2 ()
#11 0x000000000059f8f3 in internal_catch ()
#12 0x0000000000511d19 in command_loop ()
#13 0x00000000005165ba in recursive_edit_1 ()
#14 0x0000000000516937 in Frecursive_edit ()
#15 0x000000000042abda in main ()
(gdb) c
Continuing.

Message #20 received at 60356 <at> debbugs.gnu.org (full text, mbox):

From: Po Lu <luangruo <at> yahoo.com>
To: Linus Heckemann <git <at> sphalerite.org>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 60356 <at> debbugs.gnu.org
Subject: Re: bug#60356: 30.0.50; individual frame loses keyboard focus,
 focus cannot be restored
Date: Wed, 04 Jan 2023 09:08:57 +0800

Would you please do what I asked earlier, namely:

git <at> sphalerite.org writes:

> The exact action leading to this bug is not clear to me. It seems to be
> related to lsp-mode though -- I've not observed it happening without
> lsp-mode.
>
> The symptom is that a single frame will no longer accept keyboard input,
> and will visually indicate that it is not focused (outline rectangular
> cursor where I'd usually expect a solid rectangular cursor). Mouse input
> still works, and other frames still accept keyboard input as normal.
>
> I'd be glad if anyone could point out ways to further debug this issue.
> I'm also in #emacs:matrix.org (@linus:schreibt.jetzt) in case
> fast-turnaround communication would be helpful :)

Can you reliably reproduce this issue?

If you can, please add some instrumentation to x_new_focus_frame, like
this:

diff --git a/src/xterm.c b/src/xterm.c
index 1eef8e7a724..cda2897e013 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -11695,6 +11695,9 @@ x_new_focus_frame (struct x_display_info *dpyinfo, struct frame *frame)
     }
 #endif
 
+  fprintf (stderr, "x_new_focus_frame: switching focus to"
+	   " %s\n", SSDATA (frame->name));
+
   if (frame != dpyinfo->x_focus_frame)
     {
       /* Set this before calling other routines, so that they see

and see what is printed out when you try to focus the frame that does
not accept input.  Thanks.

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