Debian Bug report logs -
#984593
libmutter-7-0: gnome-shell segfaults because monitor_mode contains null pointer.
Full log
🔗
View this message in rfc822 format
[Message part 1 (text/plain, inline)]
Your message dated Mon, 28 Apr 2025 20:04:43 -0400
with message-id <CAD+GYvw2akeASYHZ98B_a4gkRFfQLitcpKD1q83CUDQqL8LRzw@mail.gmail.com>
and subject line Re: libmutter-7-0: gnome-shell segfaults because monitor_mode contains null pointer.
has caused the Debian Bug report #984593,
regarding libmutter-7-0: gnome-shell segfaults because monitor_mode contains null pointer.
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact [email protected]
immediately.)
--
984593: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=984593
Debian Bug Tracking System
Contact [email protected] with problems
[Message part 2 (message/rfc822, inline)]
[Message part 3 (text/plain, inline)]
Package: libmutter-7-0
Version: 3.38.3-2
Severity: normal
X-Debbugs-Cc: [email protected]
Dear Maintainer,
I tried to replicate #982572, therefore
setup a qemu VM with two qxl devices [1].
This is currently running a kernel 5.2 due to #983934.
Inside I have trouble with mouse input,
therefore activated remote access by keyboard.
(Unfortunately can just access one of the
two screens with this method.)
On that screen I did some resolution changes and
window moves, then gnome-shell crashed.
I have not yet tried to reproduce this or cannot
say if this happens because of this special setup.
Found also no other down- or any upstream bug about this.
It seems that we get in [3] a nullpointer for "monitor_mode",
that gets dereferenced later.
In [2] are the last frames of the backtrace, complete
in attached file.
Kind regards,
Bernhard
[3] https://sources.debian.org/src/mutter/3.38.3-3/src/backends/meta-renderer.c/#L228
[2]
(gdb) bt
#0 meta_monitor_mode_foreach_crtc (monitor=monitor@entry=0x55c936bd45a0, mode=0x0, func=func@entry=0x7fbadddaf010 <collect_views>, user_data=user_data@entry=0x7fff8032e9e0, error=error@entry=0x0) at ../src/backends/meta-monitor.c:1912
#1 0x00007fbadddaefe5 in meta_renderer_real_get_views_for_monitor (renderer=<optimized out>, monitor=0x55c936bd45a0) at ../src/backends/meta-renderer.c:228
#2 0x00007fbadde3190f in is_redraw_queued (monitor_src=0x7fbacc039150) at ../src/backends/meta-screen-cast-monitor-stream-src.c:210
#3 sync_cursor_state (monitor_src=0x7fbacc039150) at ../src/backends/meta-screen-cast-monitor-stream-src.c:228
#4 0x00007fbadeab80a2 in g_closure_invoke (closure=0x55c9376dd460, return_value=return_value@entry=0x0, n_param_values=1, param_values=param_values@entry=0x7fff8032ebd0, invocation_hint=invocation_hint@entry=0x7fff8032eb50) at ../../../gobject/gclosure.c:810
#5 0x00007fbadeaca602 in signal_emit_unlocked_R (node=node@entry=0x55c936648d40, detail=detail@entry=0, instance=instance@entry=0x7fbac0002280, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7fff8032ebd0) at ../../../gobject/gsignal.c:3809
#6 0x00007fbadead06cf in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fff8032ed50) at ../../../gobject/gsignal.c:3495
#7 0x00007fbadead0c3f in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at ../../../gobject/gsignal.c:3551
#8 0x00007fbadde4cdba in meta_wayland_pointer_set_focus (pointer=0x55c936be7820, surface=<optimized out>) at ../src/wayland/meta-wayland-pointer.c:973
#9 0x00007fbadde4d40d in repick_for_event (pointer=0x55c936be7820, for_event=<optimized out>) at ../src/wayland/meta-wayland-pointer.c:640
...
[1] -spice port=5930,addr=$LOCALIP,disable-ticketing -device qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vgamem_mb=16,max_outputs=1 -device qxl,id=video1,ram_size=67108864,vram_size=67108864,vram64_size_mb=0,vgamem_mb=16,max_outputs=1
-- System Information:
Debian Release: bullseye/sid
APT prefers testing-debug
APT policy: (500, 'testing-debug'), (500, 'proposed-updates-debug'), (500, 'testing')
Architecture: amd64 (x86_64)
Kernel: Linux 5.2.0-3-amd64 (SMP w/4 CPU threads)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages libmutter-7-0 depends on:
ii adwaita-icon-theme 3.38.0-1
ii gsettings-desktop-schemas 3.38.0-2
ii libatk1.0-0 2.36.0-2
ii libc6 2.31-9
ii libcairo-gobject2 1.16.0-5
ii libcairo2 1.16.0-5
ii libcanberra0 0.30-7
ii libdrm2 2.4.104-1
ii libegl1 1.3.2-1
ii libfontconfig1 2.13.1-4.2
ii libfribidi0 1.0.8-2
ii libgbm1 20.3.4-1
ii libgdk-pixbuf-2.0-0 2.42.2+dfsg-1
ii libgl1 1.3.2-1
ii libglib2.0-0 2.66.7-1
ii libgnome-desktop-3-19 3.38.4-1
ii libgraphene-1.0-0 1.10.4+dfsg1-1
ii libgtk-3-0 3.24.24-1
ii libgudev-1.0-0 234-1
ii libice6 2:1.0.10-1
ii libinput10 1.16.4-3
ii libjson-glib-1.0-0 1.6.2-1
ii libpango-1.0-0 1.46.2-3
ii libpangocairo-1.0-0 1.46.2-3
ii libpangoft2-1.0-0 1.46.2-3
ii libpipewire-0.3-0 0.3.19-4
ii libsm6 2:1.2.3-1
ii libstartup-notification0 0.12-6+b1
ii libsystemd0 247.3-1
ii libudev1 247.3-1
ii libwacom2 1.8-2
ii libwayland-server0 1.18.0-2~exp1.1
ii libx11-6 2:1.7.0-2
ii libx11-xcb1 2:1.7.0-2
ii libxau6 1:1.0.9-1
ii libxcb-randr0 1.14-3
ii libxcb-res0 1.14-3
ii libxcb1 1.14-3
ii libxcomposite1 1:0.4.5-1
ii libxcursor1 1:1.2.0-2
ii libxdamage1 1:1.1.5-2
ii libxext6 2:1.3.3-1.1
ii libxfixes3 1:5.0.3-2
ii libxi6 2:1.7.10-1
ii libxinerama1 2:1.1.4-2
ii libxkbcommon-x11-0 1.0.3-2
ii libxkbcommon0 1.0.3-2
ii libxkbfile1 1:1.1.0-1
ii libxrandr2 2:1.5.1-1
ii libxtst6 2:1.2.3-1
ii mutter-common 3.38.3-2
libmutter-7-0 recommends no packages.
libmutter-7-0 suggests no packages.
Versions of packages libmutter-7-0 is related to:
ii libegl-mesa0 [libegl-vendor] 20.3.4-1
ii libgl1-mesa-dri 20.3.4-1
ii libglx-mesa0 [libglx-vendor] 20.3.4-1
-- no debconf information
Thank you for using reportbug
[debugging.txt (text/plain, attachment)]
[Message part 5 (message/rfc822, inline)]
There have been many changes to Debian since this bug was originally
reported. If you are still experiencing this issue with Debian 12 (or
with Testing or Unstable), please report a new bug.
Thank you,
Jeremy Bícha
Send a report that this bug log contains spam.
Debian bug tracking system administrator <[email protected]>.
Last modified:
Tue May 13 11:36:31 2025;
Machine Name:
buxtehude
Debian Bug tracking system
Debbugs is free software and licensed under the terms of the GNU General
Public License version 2. The current version can be obtained
from https://bugs.debian.org/debbugs-source/.
Copyright © 1999 Darren O. Benham,
1997,2003 nCipher Corporation Ltd,
1994-97 Ian Jackson,
2005-2017 Don Armstrong, and many other contributors.
From: Bernhard Übelacker <[email protected]>To: Debian Bug Tracking System <[email protected]>Subject: libmutter-7-0: gnome-shell segfaults because monitor_mode contains null pointer.Date: Fri, 5 Mar 2021 16:02:56 +0100[Message part 3 (text/plain, inline)][debugging.txt (text/plain, attachment)]
From: Jeremy Bícha <[email protected]>Subject: Re: libmutter-7-0: gnome-shell segfaults because monitor_mode contains null pointer.Date: Mon, 28 Apr 2025 20:04:43 -0400