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Subject: bug#63764: 30.0.50; pixel-scroll-precision-mode starts skipping pages after selecting region
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The following steps reproduces the bug.

Start emacs with `emacs -Q`

M-x pixel-scroll-precision-mode

Scroll a large buffer, works great.

Click and drag to select a region in the buffer. Click somewhere else in
the buffer. to unselect it. Scrolling around will now randomly skip entire
pages after scrolling 4-5 lines. This makes the mode unusable.

Additional info:

This emacs version is built using the settings for the default Tumbleweed
install, but with emacs 30.0.50 and some different settings. (native comp
and treesit)

emacs-30.0.50.14776.d4ff1d74209-65.6.x86_64 from vendor obs://
build.opensuse.org/home:Thaodan

In GNU Emacs 30.0.50 (build 1, x86_64-suse-linux-gnu, GTK+ Version
3.24.38, cairo version 1.17.8)
System Description: openSUSE Tumbleweed

Configured using:
 'configure --disable-build-details --without-pop --with-mailutils
 --without-hesiod --with-gameuser=:games --with-kerberos
 --with-kerberos5 --with-file-notification=inotify --with-modules
 --enable-autodepend --prefix=/usr --mandir=/usr/share/man
 --infodir=/usr/share/info --datadir=/usr/share --localstatedir=/var
 --sharedstatedir=/var/lib --libexecdir=/usr/libexec
 --with-file-notification=yes --with-native-compilation=aot
 --enable-locallisppath=/usr/share/emacs/30.0.50/site-lisp:/usr/share/emacs/site-lisp
 --with-x --with-xim --with-sound --with-xpm --with-jpeg --with-tiff
 --with-gif --with-png --with-rsvg --with-dbus --with-xft --without-gpm
 --with-tree-sitter --with-pgtk --with-toolkit-scroll-bars
 --x-includes=/usr/include --x-libraries=/usr/lib64 --with-libotf
 --with-m17n-flt --with-cairo --with-xwidgets --build=x86_64-suse-linux
 --with-dumping=pdumper 'CFLAGS=-O2 -Wall -U_FORTIFY_SOURCE
 -D_FORTIFY_SOURCE=3 -fstack-protector-strong -funwind-tables
 -fasynchronous-unwind-tables -fstack-clash-protection
 -Werror=return-type -flto=auto -g -D_GNU_SOURCE
 -DGDK_DISABLE_DEPRECATION_WARNINGS -DGLIB_DISABLE_DEPRECATION_WARNINGS
 -pipe -Wno-pointer-sign -Wno-unused-variable -Wno-unused-label
 -fno-optimize-sibling-calls -DPDMP_BASE='\''"emacs-gtk"'\'''
 LDFLAGS=-Wl,-O2'

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON
LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 MODULES NATIVE_COMP NOTIFY
INOTIFY PDUMPER PGTK PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XIM XWIDGETS GTK3 ZLIB

Important settings:
  value of $LC_NUMERIC: POSIX
  value of $LANG: en_US.utf8
  value of $XMODIFIERS: @im=local
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message mailcap yank-media puny dired
dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg rfc6068
epg-config gnus-util text-property-search time-date mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs
comp comp-cstr warnings icons subr-x rx cl-seq cl-macs gv cl-extra
help-mode bytecomp byte-compile cl-lib sendmail rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mail-utils rmc iso-transl tooltip cconv
eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type
elisp-mode mwheel term/pgtk-win pgtk-win term/common-win pgtk-dnd
tool-bar dnd fontset image regexp-opt fringe tabulated-list replace
newcomment text-mode lisp-mode prog-mode register page tab-bar menu-bar
rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock
font-lock syntax font-core term/tty-colors frame minibuffer nadvice seq
simple cl-generic indonesian philippine cham georgian utf-8-lang
misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms
cp51932 hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese composite emoji-zwj charscript charprop case-table
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
xwidget-internal dbusbind inotify dynamic-setting system-font-setting
font-render-setting cairo gtk pgtk lcms2 multi-tty make-network-process
native-compile emacs)

Memory information:
((conses 16 77561 8914)
 (symbols 48 7157 0)
 (strings 32 19290 1790)
 (string-bytes 1 576469)
 (vectors 16 14516)
 (vector-slots 8 263723 10059)
 (floats 8 28 52)
 (intervals 56 377 0)
 (buffers 984 12))

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Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr"><div>The following steps reproduces the bug.</div><div><br=
></div><div>Start emacs with `emacs -Q` <br></div><div><br></div><div>M-x p=
ixel-scroll-precision-mode</div><div><br></div><div>Scroll a large buffer, =
works great. <br></div><div><br></div><div>Click and drag to select a regio=
n in the buffer. Click somewhere else in the buffer. to unselect it. Scroll=
ing around will now randomly skip entire pages after scrolling 4-5 lines. T=
his makes the mode unusable.<br></div><div><br></div><div>Additional info:<=
/div><div><br></div><div>This emacs version is built using the settings for=
 the default Tumbleweed install, but with emacs 30.0.50 and some different =
settings. (native comp and treesit)<br></div><div><br></div><div>emacs-30.0=
.50.14776.d4ff1d74209-65.6.x86_64 from vendor obs://<a href=3D"http://build=
.opensuse.org/home:Thaodan">build.opensuse.org/home:Thaodan</a></div><div><=
br></div><div>In GNU Emacs 30.0.50 (build 1, x86_64-suse-linux-gnu, GTK+ Ve=
rsion</div>3.24.38, cairo version 1.17.8)<br>System Description: openSUSE T=
umbleweed<br><br>Configured using:<br>=C2=A0&#39;configure --disable-build-=
details --without-pop --with-mailutils<br>=C2=A0--without-hesiod --with-gam=
euser=3D:games --with-kerberos<br>=C2=A0--with-kerberos5 --with-file-notifi=
cation=3Dinotify --with-modules<br>=C2=A0--enable-autodepend --prefix=3D/us=
r --mandir=3D/usr/share/man<br>=C2=A0--infodir=3D/usr/share/info --datadir=
=3D/usr/share --localstatedir=3D/var<br>=C2=A0--sharedstatedir=3D/var/lib -=
-libexecdir=3D/usr/libexec<br>=C2=A0--with-file-notification=3Dyes --with-n=
ative-compilation=3Daot<br>=C2=A0--enable-locallisppath=3D/usr/share/emacs/=
30.0.50/site-lisp:/usr/share/emacs/site-lisp<br>=C2=A0--with-x --with-xim -=
-with-sound --with-xpm --with-jpeg --with-tiff<br>=C2=A0--with-gif --with-p=
ng --with-rsvg --with-dbus --with-xft --without-gpm<br>=C2=A0--with-tree-si=
tter --with-pgtk --with-toolkit-scroll-bars<br>=C2=A0--x-includes=3D/usr/in=
clude --x-libraries=3D/usr/lib64 --with-libotf<br>=C2=A0--with-m17n-flt --w=
ith-cairo --with-xwidgets --build=3Dx86_64-suse-linux<br>=C2=A0--with-dumpi=
ng=3Dpdumper &#39;CFLAGS=3D-O2 -Wall -U_FORTIFY_SOURCE<br>=C2=A0-D_FORTIFY_=
SOURCE=3D3 -fstack-protector-strong -funwind-tables<br>=C2=A0-fasynchronous=
-unwind-tables -fstack-clash-protection<br>=C2=A0-Werror=3Dreturn-type -flt=
o=3Dauto -g -D_GNU_SOURCE<br>=C2=A0-DGDK_DISABLE_DEPRECATION_WARNINGS -DGLI=
B_DISABLE_DEPRECATION_WARNINGS<br>=C2=A0-pipe -Wno-pointer-sign -Wno-unused=
-variable -Wno-unused-label<br>=C2=A0-fno-optimize-sibling-calls -DPDMP_BAS=
E=3D&#39;\&#39;&#39;&quot;emacs-gtk&quot;&#39;\&#39;&#39;&#39;<br>=C2=A0LDF=
LAGS=3D-Wl,-O2&#39;<br><br>Configured features:<br>ACL CAIRO DBUS FREETYPE =
GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON<br>LCMS2 LIBOTF LIBSELINUX=
 LIBSYSTEMD LIBXML2 MODULES NATIVE_COMP NOTIFY<br>INOTIFY PDUMPER PGTK PNG =
RSVG SECCOMP SOUND SQLITE3 THREADS TIFF<br>TOOLKIT_SCROLL_BARS TREE_SITTER =
WEBP XIM XWIDGETS GTK3 ZLIB<br><br>Important settings:<br>=C2=A0 value of $=
LC_NUMERIC: POSIX<br>=C2=A0 value of $LANG: en_US.utf8<br>=C2=A0 value of $=
XMODIFIERS: @im=3Dlocal<br>=C2=A0 locale-coding-system: utf-8-unix<br><br>M=
ajor mode: Lisp Interaction<br><br>Minor modes in effect:<br>=C2=A0 tooltip=
-mode: t<br>=C2=A0 global-eldoc-mode: t<br>=C2=A0 eldoc-mode: t<br>=C2=A0 s=
how-paren-mode: t<br>=C2=A0 electric-indent-mode: t<br>=C2=A0 mouse-wheel-m=
ode: t<br>=C2=A0 tool-bar-mode: t<br>=C2=A0 menu-bar-mode: t<br>=C2=A0 file=
-name-shadow-mode: t<br>=C2=A0 global-font-lock-mode: t<br>=C2=A0 font-lock=
-mode: t<br>=C2=A0 blink-cursor-mode: t<br>=C2=A0 line-number-mode: t<br>=
=C2=A0 indent-tabs-mode: t<br>=C2=A0 transient-mark-mode: t<br>=C2=A0 auto-=
composition-mode: t<br>=C2=A0 auto-encryption-mode: t<br>=C2=A0 auto-compre=
ssion-mode: t<br><br>Load-path shadows:<br>None found.<br><br>Features:<br>=
(shadow sort mail-extr emacsbug message mailcap yank-media puny dired<br>di=
red-loaddefs rfc822 mml mml-sec password-cache epa derived epg rfc6068<br>e=
pg-config gnus-util text-property-search time-date mm-decode mm-bodies<br>m=
m-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs<br>=
comp comp-cstr warnings icons subr-x rx cl-seq cl-macs gv cl-extra<br>help-=
mode bytecomp byte-compile cl-lib sendmail rfc2047 rfc2045<br>ietf-drums mm=
-util mail-prsvr mail-utils rmc iso-transl tooltip cconv<br>eldoc paren ele=
ctric uniquify ediff-hook vc-hooks lisp-float-type<br>elisp-mode mwheel ter=
m/pgtk-win pgtk-win term/common-win pgtk-dnd<br>tool-bar dnd fontset image =
regexp-opt fringe tabulated-list replace<br>newcomment text-mode lisp-mode =
prog-mode register page tab-bar menu-bar<br>rfn-eshadow isearch easymenu ti=
mer select scroll-bar mouse jit-lock<br>font-lock syntax font-core term/tty=
-colors frame minibuffer nadvice seq<br>simple cl-generic indonesian philip=
pine cham georgian utf-8-lang<br>misc-lang vietnamese tibetan thai tai-viet=
 lao korean japanese eucjp-ms<br>cp51932 hebrew greek romanian slovak czech=
 european ethiopic indian<br>cyrillic chinese composite emoji-zwj charscrip=
t charprop case-table<br>epa-hook jka-cmpr-hook help abbrev obarray oclosur=
e cl-preloaded button<br>loaddefs theme-loaddefs faces cus-face macroexp fi=
les window<br>text-properties overlay sha1 md5 base64 format env code-pages=
 mule<br>custom widget keymap hashtable-print-readable backquote threads<br=
>xwidget-internal dbusbind inotify dynamic-setting system-font-setting<br>f=
ont-render-setting cairo gtk pgtk lcms2 multi-tty make-network-process<br>n=
ative-compile emacs)<br><br>Memory information:<br>((conses 16 77561 8914)<=
br>=C2=A0(symbols 48 7157 0)<br>=C2=A0(strings 32 19290 1790)<br>=C2=A0(str=
ing-bytes 1 576469)<br>=C2=A0(vectors 16 14516)<br>=C2=A0(vector-slots 8 26=
3723 10059)<br>=C2=A0(floats 8 28 52)<br>=C2=A0(intervals 56 377 0)<br>=C2=
=A0(buffers 984 12))<br></div>

--00000000000062ad6805fcba13e9--

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To: Patrick Poitras <patrick.f.poitras@HIDDEN>
Subject: bug#63764: Acknowledgement (30.0.50; pixel-scroll-precision-mode
 starts skipping pages after selecting region)
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Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#63764: 30.0.50; pixel-scroll-precision-mode starts skipping pages after selecting region
Resent-From: Eli Zaretskii <eliz@HIDDEN>
Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
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Cc: 63764 <at> debbugs.gnu.org
Date: Sun, 28 May 2023 11:24:22 +0300
Message-Id: <83fs7gj22x.fsf@HIDDEN>
From: Eli Zaretskii <eliz@HIDDEN>
In-Reply-To: <CACpx+d41uHj-vOq5nFiEKxWJ_WjcMANgg8FJHPX4R4v7Yd2dfg@HIDDEN>
 (message from Patrick Poitras on Sat, 27 May 2023 22:16:31 -0700)
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> From: Patrick Poitras <patrick.f.poitras@HIDDEN>
> Date: Sat, 27 May 2023 22:16:31 -0700
> 
> Start emacs with `emacs -Q` 
> 
> M-x pixel-scroll-precision-mode
> 
> Scroll a large buffer, works great. 
> 
> Click and drag to select a region in the buffer. Click somewhere else in the buffer. to unselect it.
> Scrolling around will now randomly skip entire pages after scrolling 4-5 lines. This makes the mode
> unusable.

I cannot reproduce this, FWIW.  The effect of scrolling is the same
before and after selecting a region.

Perhaps this is one more effect of known (and not yet solved) issues
with native-compilation?  My Emacs was build without it.

Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#63764: 30.0.50; pixel-scroll-precision-mode starts skipping pages after selecting region
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From: Patrick Poitras <patrick.f.poitras@HIDDEN>
Date: Sun, 28 May 2023 10:52:13 -0700
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Given it's 100% reproducible on my build, I went ahead with some testing of
configuration options.

It seems related to PGTK. ./configure --with-pgtk has the bug whereas the
version without it does not. Given the warning message about using PGTK
with X11, I assume that this falls under the same umbrella, and that I
should go complain to the package builders.

Let me know if there's anything more to look at.
Patrick

On Sun, May 28, 2023 at 1:23=E2=80=AFAM Eli Zaretskii <eliz@HIDDEN> wrote:

> > From: Patrick Poitras <patrick.f.poitras@HIDDEN>
> > Date: Sat, 27 May 2023 22:16:31 -0700
> >
> > Start emacs with `emacs -Q`
> >
> > M-x pixel-scroll-precision-mode
> >
> > Scroll a large buffer, works great.
> >
> > Click and drag to select a region in the buffer. Click somewhere else i=
n
> the buffer. to unselect it.
> > Scrolling around will now randomly skip entire pages after scrolling 4-=
5
> lines. This makes the mode
> > unusable.
>
> I cannot reproduce this, FWIW.  The effect of scrolling is the same
> before and after selecting a region.
>
> Perhaps this is one more effect of known (and not yet solved) issues
> with native-compilation?  My Emacs was build without it.
>

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<div dir=3D"ltr"><div>Given it&#39;s 100% reproducible on my build, I went =
ahead with some testing of configuration options. <br></div><div><br></div>=
<div>It
 seems related to PGTK. ./configure --with-pgtk has the bug whereas the=20
version without it does not. Given the warning message about using PGTK=20
with X11, I assume that this falls under the same umbrella, and that I=20
should go complain to the package builders.</div><div><br></div><div>Let me=
 know if there&#39;s anything more to look at.</div><div>Patrick</div></div=
><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Su=
n, May 28, 2023 at 1:23=E2=80=AFAM Eli Zaretskii &lt;<a href=3D"mailto:eliz=
@gnu.org">eliz@HIDDEN</a>&gt; wrote:<br></div><blockquote class=3D"gmail_q=
uote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,2=
04);padding-left:1ex">&gt; From: Patrick Poitras &lt;<a href=3D"mailto:patr=
ick.f.poitras@HIDDEN" target=3D"_blank">patrick.f.poitras@HIDDEN</a>&=
gt;<br>
&gt; Date: Sat, 27 May 2023 22:16:31 -0700<br>
&gt; <br>
&gt; Start emacs with `emacs -Q` <br>
&gt; <br>
&gt; M-x pixel-scroll-precision-mode<br>
&gt; <br>
&gt; Scroll a large buffer, works great. <br>
&gt; <br>
&gt; Click and drag to select a region in the buffer. Click somewhere else =
in the buffer. to unselect it.<br>
&gt; Scrolling around will now randomly skip entire pages after scrolling 4=
-5 lines. This makes the mode<br>
&gt; unusable.<br>
<br>
I cannot reproduce this, FWIW.=C2=A0 The effect of scrolling is the same<br=
>
before and after selecting a region.<br>
<br>
Perhaps this is one more effect of known (and not yet solved) issues<br>
with native-compilation?=C2=A0 My Emacs was build without it.<br>
</blockquote></div>

--000000000000fc3c6405fcc4a1fe--

Last modified: Sun, 28 May 2023 18:00:02 UTC

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.