This bug was fixed in the package mutter - 47.0-1ubuntu4.1
---------------
mutter (47.0-1ubuntu4.1) oracular; urgency=medium
* Add seat-impl-Initialize-the-impl-reverse-pointer-slightly-ea.patch
to avoid crashing when mousekeys or keyboard a11y features are
enabled (LP: #2081728)
-- Daniel van Vugt <daniel.van.v...@canonical.com> Wed, 30 Oct 2024
13:29:45 +0100
** Changed in: mutter (Ubuntu Oracular)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/2081728
Title:
Startup crash (meta_seat_impl_run_input_task) with a wayland session
and mouse keys
Status in Mutter:
New
Status in mutter package in Ubuntu:
Fix Released
Status in mutter source package in Noble:
Invalid
Status in mutter source package in Oracular:
Fix Released
Bug description:
[ Impact ]
GNOME Shell Wayland sessions crash on startup if Mouse Keys (and other?)
accessibility features are enabled. This seems to affect a large number of
people:
https://errors.ubuntu.com/problem/8a95f1902f49fc831d4bee942899ed1239896c64
[ Test Plan ]
1. Enable Mouse Keys: Settings > Accessibility > Pointing & Clicking > Mouse
Keys = ON
2. Log out.
3. Log in (to a Wayland session).
Expect: You can log in at all. When the bug is present you won't be
able to log in without using 'Ubuntu on Xorg'.
[ Where problems could occur ]
During Wayland session startup, particularly relating to input
support. Potentially other crashes could occur, or input devices
malfunction.
[ Other Info ]
Core was generated by `/usr/bin/gnome-shell'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 meta_seat_impl_run_input_task (seat_impl=0x0, task=0x71bacc029130,
dispatch_func=0x71bb2c9c2e10 <create_device_in_impl>) at
../src/backends/native/meta-seat-impl.c:144
144 g_source_attach (source, seat_impl->input_context);
[Current thread is 1 (Thread 0x71bb074006c0 (LWP 34862))]
>>> bt
#0 meta_seat_impl_run_input_task (seat_impl=0x0, task=0x71bacc029130
[GTask], dispatch_func=0x71bb2c9c2e10 <create_device_in_impl>)
at ../src/backends/native/meta-seat-impl.c:144
#1 0x000071bb2c9c8278 in meta_virtual_input_device_native_constructed
(object=0x71bacc0842e0 [MetaVirtualInputDeviceNative])
at ../src/backends/native/meta-virtual-input-device-native.c:1042
#2 0x000071bb2d41801a in g_object_new_internal (class=0x71bacc030fd0,
params=0x71bb073fe9a0, n_params=3) at ../../../gobject/gobject.c:2657
#3 0x000071bb2d41a0fb in g_object_new_internal (class=0x71bacc030fd0,
params=0x71bb073fe9a0, n_params=3) at ../../../gobject/gobject.c:2923
#4 g_object_new_valist (object_type=<optimized out>,
first_property_name=first_property_name@entry=0x71bb2c9e3fc6 "seat",
var_args=var_args@entry=0x71bb073fec70)
at ../../../gobject/gobject.c:2945
#5 0x000071bb2d41a47f in g_object_new (object_type=<optimized out>,
first_property_name=first_property_name@entry=0x71bb2c9e3fc6 "seat") at
../../../gobject/gobject.c:2418
#6 0x000071bb2c9b8218 in meta_seat_native_create_virtual_device
(seat=0x5d75cfc73480 [MetaSeatNative], device_type=CLUTTER_POINTER_DEVICE)
at ../src/backends/native/meta-virtual-input-device-native.c:101
#7 0x000071bb2c99659b in enable_mousekeys (device_evdev=0x71bacc002580
[MetaInputDeviceNative]) at
../src/backends/native/meta-input-device-native.c:957
#8 meta_input_device_native_apply_kbd_a11y_settings_in_impl
(device=0x71bacc002580 [MetaInputDeviceNative], settings=0x71bb073fedc0)
at ../src/backends/native/meta-input-device-native.c:1308
#9 0x000071bb2c9ba0b3 in meta_seat_impl_take_device
(seat_impl=seat_impl@entry=0x5d75cfc74900 [MetaSeatImpl],
device=device@entry=0x71bacc08e540 [MetaInputDeviceNative])
at ../src/backends/native/meta-seat-impl.c:1739
#10 0x000071bb2c9be18e in process_base_event (seat_impl=0x5d75cfc74900
[MetaSeatImpl], event=0x71bacc07aa40) at
../src/backends/native/meta-seat-impl.c:1797
#11 process_event (seat_impl=0x5d75cfc74900 [MetaSeatImpl],
event=0x71bacc07aa40) at ../src/backends/native/meta-seat-impl.c:2683
#12 process_events (seat_impl=seat_impl@entry=0x5d75cfc74900 [MetaSeatImpl])
at ../src/backends/native/meta-seat-impl.c:2699
#13 0x000071bb2c9bfc21 in init_libinput (seat_impl=0x5d75cfc74900
[MetaSeatImpl], error=0x71bb073fef20) at
../src/backends/native/meta-seat-impl.c:2869
#14 input_thread (seat_impl=0x5d75cfc74900 [MetaSeatImpl]) at
../src/backends/native/meta-seat-impl.c:2968
#15 0x000071bb2cd6ad02 in g_thread_proxy (data=0x5d75cfc629a0) at
../../../glib/gthread.c:892
#16 0x000071bb2c4a1e2e in start_thread (arg=<optimized out>) at
./nptl/pthread_create.c:447
#17 0x000071bb2c533a4c in __GI___clone3 () at
../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
apt policy gnome-shell
gnome-shell:
Installed: 47.0-1ubuntu2
Candidate: 47.0-1ubuntu2
Version table:
*** 47.0-1ubuntu2 1000
1000 http://fr.archive.ubuntu.com/ubuntu oracular/main amd64 Packages
100 /var/lib/dpkg/status
Since I can do without mouse keys, a workaround is to run
gsettings set org.gnome.desktop.a11y.keyboard mousekeys-enable false
from a virtual terminal, or to start an X11 session and disable mouse keys
from the preferences.
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