I suggest the best way to get the fix into jammy is to propose a cherry
pick upstream to the 'gnome-42' branch (hoping for version 42.7)
** Changed in: mutter (Ubuntu)
Status: In Progress => Fix Committed
** Tags added: fixed-in-mutter-43.1 fixed-upstream
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https://bugs.launchpad.net/bugs/1994519
Title:
DisplayLink display is black on plug-in and mutter crash after moving
cursor on DisplayLink display.
Status in Mutter:
Fix Released
Status in mutter package in Ubuntu:
Fix Committed
Bug description:
This is recent regression with reproduction rate 100%.
This is regression mutter-43, Ubuntu 22.04 works fine.
Bug is raised on Gnome/mutter:
https://gitlab.gnome.org/GNOME/mutter/-/issues/2481
Fix is under review:
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2676
### Steps to reproduce
1. Login
2. Attach DisplayLink device with display connected
3. Notice that display is visible in Display Preferences but display stays
blank.
4. Move cursor over DisplayLink display.
5. Mutter crashes.
### What happened
Mutter crashes, user is asked to log-in again.
### What did you expect to happen
Mutter does not crash.
### Relevant logs, screenshots, screencasts etc.
Crash in line:
https://gitlab.gnome.org/GNOME/mutter/-/blob/main/src/backends/native/meta-renderer-native.c#L226
Crash backtrace:
```
Thread 1 "gnome-shell" received signal SIGSEGV, Segmentation fault.
0x00007f9209c35329 in meta_gbm_device_from_gpu (gpu_kms=0x55eb13bc9e00) at
../src/backends/native/meta-renderer-native.c:204
204 render_device = renderer_gpu_data->render_device;
(gdb) bt
#0 0x00007f9209c35329 in meta_gbm_device_from_gpu (gpu_kms=0x55eb13bc9e00)
at ../src/backends/native/meta-renderer-native.c:204
#1 0x00007f9209c06674 in create_cursor_drm_buffer (gpu_kms=0x55eb13bc9e00,
device_file=0x55eb15eaa860, pixels=0x7f91b4bb9700 "", width=24, height=24,
stride=96, cursor_width=64, cursor_height=64, format=875713089,
error=0x7ffda9443108) at
../src/backends/native/meta-cursor-renderer-native.c:1329
#2 0x00007f9209c068b9 in load_cursor_sprite_gbm_buffer_for_gpu
(native=0x55eb1617f580, gpu_kms=0x55eb13bc9e00, cursor_sprite=0x55eb1918fb00,
pixels=0x7f91b4bb9700 "", width=24, height=24, rowstride=96,
gbm_format=875713089) at
../src/backends/native/meta-cursor-renderer-native.c:1399
#3 0x00007f9209c06f98 in load_scaled_and_transformed_cursor_sprite
(native=0x55eb1617f580, gpu_kms=0x55eb13bc9e00, cursor_sprite=0x55eb1918fb00,
relative_scale=1, relative_transform=META_MONITOR_TRANSFORM_NORMAL,
data=0x7f91b4bb9700 "", width=24, height=24, rowstride=96, gbm_format=875713089)
at ../src/backends/native/meta-cursor-renderer-native.c:1574
#4 0x00007f9209c07293 in realize_cursor_sprite_from_wl_buffer_for_gpu
(renderer=0x55eb1617f580, gpu_kms=0x55eb13bc9e00,
sprite_wayland=0x55eb1918fb00) at
../src/backends/native/meta-cursor-renderer-native.c:1670
#5 0x00007f9209c07788 in realize_cursor_sprite_for_gpu
(renderer=0x55eb1617f580, gpu_kms=0x55eb13bc9e00, cursor_sprite=0x55eb1918fb00)
at ../src/backends/native/meta-cursor-renderer-native.c:1836
#6 0x00007f9209c077cf in realize_cursor_sprite (renderer=0x55eb1617f580,
cursor_sprite=0x55eb1918fb00, gpus=0x55eb16345a20 = {...}) at
../src/backends/native/meta-cursor-renderer-native.c:1854
#7 0x00007f9209c05dd4 in meta_cursor_renderer_native_update_cursor
(renderer=0x55eb1617f580, cursor_sprite=0x55eb1918fb00) at
../src/backends/native/meta-cursor-renderer-native.c:1087
#8 0x00007f9209aac8fa in meta_cursor_renderer_update_cursor
(renderer=0x55eb1617f580, cursor_sprite=0x55eb1918fb00) at
../src/backends/meta-cursor-renderer.c:413
#9 0x00007f9209aaca07 in meta_cursor_renderer_force_update
(renderer=0x55eb1617f580) at ../src/backends/meta-cursor-renderer.c:448
#10 0x00007f9209bc4dc6 in update_cursor_sprite_texture
(cursor_surface=0x55eb1924d880) at
../src/wayland/meta-wayland-cursor-surface.c:79
#11 0x00007f9209bc512a in meta_wayland_cursor_surface_apply_state
(surface_role=0x55eb1924d880, pending=0x55eb1918d410) at
../src/wayland/meta-wayland-cursor-surface.c:179
#12 0x00007f9209be3774 in meta_wayland_surface_role_apply_state
(surface_role=0x55eb1924d880, pending=0x55eb1918d410) at
../src/wayland/meta-wayland-surface.c:1938
#13 0x00007f9209be14b6 in meta_wayland_surface_apply_state
(surface=0x55eb16305e60, state=0x55eb1918d410) at
../src/wayland/meta-wayland-surface.c:882
#14 0x00007f9209be19c7 in meta_wayland_surface_commit
(surface=0x55eb16305e60) at ../src/wayland/meta-wayland-surface.c:1038
#15 0x00007f9209be1e9f in wl_surface_commit (client=0x55eb191d7150,
resource=0x55eb191f1eb0) at ../src/wayland/meta-wayland-surface.c:1191
#16 0x00007f9209d1ae2e in () at /lib/x86_64-linux-gnu/libffi.so.8
#17 0x00007f9209d17493 in () at /lib/x86_64-linux-gnu/libffi.so.8
#18 0x00007f920aea42a0 in () at /lib/x86_64-linux-gnu/libwayland-server.so.0
#19 0x00007f920aea8694 in () at /lib/x86_64-linux-gnu/libwayland-server.so.0
#20 0x00007f920aea70fa in wl_event_loop_dispatch () at
/lib/x86_64-linux-gnu/libwayland-server.so.0
#21 0x00007f9209bc2720 in wayland_event_source_dispatch (base=0x55eb14299890,
callback=0x0, data=0x0) at ../src/wayland/meta-wayland.c:110
#22 0x00007f920a9454f9 in g_main_context_dispatch () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f920a99a228 in () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f920a944a7f in g_main_loop_run () at
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f9209b1a0f4 in meta_context_run_main_loop (context=0x55eb13bb80c0,
error=0x7ffda9443eb8) at ../src/core/meta-context.c:445
#26 0x000055eb13017ec4 in ()
#27 0x00007f9209623510 in __libc_start_call_main
(main=main@entry=0x55eb13017a30, argc=argc@entry=1,
argv=argv@entry=0x7ffda9444058) at ../sysdeps/nptl/libc_start_call_main.h:58
#28 0x00007f92096235c9 in __libc_start_main_impl (main=0x55eb13017a30,
argc=1, argv=0x7ffda9444058, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffda9444048) at ../csu/libc-start.c:381
#29 0x000055eb13018175 in ()
(gdb)
```
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