Thanks for the bug report. Please run this command to send us additional
system info:
apport-collect 1931387
Please also follow these steps:
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Then tell us the ID of the newly-created bug.
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** Tags added: hirsute nouveau
** Package changed: wayland (Ubuntu) => gnome-shell (Ubuntu)
** Changed in: gnome-shell (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1931387
Title:
Ubuntu UI screen image freezes randomly during usage after fresh 21.04
install, suspecting Wayland
Status in gnome-shell package in Ubuntu:
Incomplete
Bug description:
Also submitted at: https://askubuntu.com/questions/1344736/ubuntu-ui-
freezes-randomly-after-fresh-21-04-install-suspecting-wayland
Let me know if there's any way to collect more useful information if
there is ever a future crash, or a better place to report.
I was running 20.10 previously with NVIDIA drivers,
Then four days ago, I did a clean 21.04 install without installing the
NVIDIA drivers, and since then the UI has frozen three times on my.
I am unable to determine exactly what action triggered the freeze.
The third time, I was just looking at a webpage, I wasn't even
touching my mouse at that exact moment, and then it just froze.
I am then unable to see anything move on the screen, including after
Ctrl + Alt + Fn, the last image just stays fixed.
The third time was also a bit different.
A few seconds after freezing, it actually went down to a black
terminal screen as during boot messages and then I was redirected to
the login screen, as if I had been logged out.
I was able to login, my programs were closed, so I was effectively
logged out.
Then two Apport windows showed up, and one of them contained several
references to Xwayland. Under
`/var/crash/_usr_bin_Xwayland.1000.crash` I see one of them:
- `ProcCmdline: /usr/bin/Xwayland :0 -rootless -noreset -accessx -core -auth
/run/user/1000/.mutter-Xwaylandauth.48ZQ40 -listen 4 -listen 5 -displayfd 6
-initfd 7
- `StackTraceAddressSignature` contained mentions of Xwayland and
nouveau_dri.so:
```
StacktraceAddressSignature:
/usr/bin/Xwayland:6:/usr/lib/x86_64-linux-gnu/libc-2.33.so+864:/usr/bin/Xwayland+13cb40:/usr/bin/Xwayland+14866f:/usr/bin/Xwayland+13b1a7:/usr/lib/x86_64-linux-gnu/libc-2.33.so+864:/usr/lib/x86_64-linux-gnu/libc-2.33.so+749:/usr/lib/x86_64-linux-gnu/libc-2.33.so+123d6:/usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2.0.0+25d7:/usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2.0.0+2537:/usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2.0.0+265f:/usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2.0.0+2a77:/usr/lib/x86_64-linux-gnu/libdrm_nouveau.so.2.0.0+31aa:/usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so+93b943:/usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so+93bc61:/usr/lib/x86_64-linux-gnu/dri/nouveau_dri.so+17cc01
```
I also checked and I am using Wayland (the default since 21.04
apparently): https://askubuntu.com/questions/904940/how-can-i-tell-
if-i-am-running-wayland/1344287#1344287
Hardware:
- Lenovo ThinkPad P51
- NVIDIA Quadro M1200 4GB GDDR5 GPU
Just after the crash, dmesg contained the following possibly
interesting lines:
```
[ 9556.450894] nouveau 0000:01:00.0: gr: TRAP ch 3 [00ff8cf000 Xwayland[3831]]
[ 9556.450907] nouveau 0000:01:00.0: gr: GPC0/TPC2/MP trap: global 00000004
[MULTIPLE_WARP_ERRORS] warp 3c000d [OOR_REG]
[ 9556.454264] nouveau 0000:01:00.0: gr: TRAP ch 3 [00ff8cf000 Xwayland[3831]]
[ 9556.454283] nouveau 0000:01:00.0: gr: GPC0/TPC0/MP trap: global 00000004
[MULTIPLE_WARP_ERRORS] warp 3e000d [OOR_REG]
[ 9556.466339] nouveau 0000:01:00.0: gr: TRAP ch 3 [00ff8cf000 Xwayland[3831]]
[ 9556.466351] nouveau 0000:01:00.0: gr: GPC0/TPC3/MP trap: global 00000004
[MULTIPLE_WARP_ERRORS] warp 3e000d [OOR_REG]
[ 9698.230726] nouveau 0000:01:00.0: Xwayland[3831]: failed to idle channel 5
[Xwayland[3831]]
[ 9713.230743] nouveau 0000:01:00.0: Xwayland[3831]: failed to idle channel 5
[Xwayland[3831]]
[ 9713.231918] nouveau 0000:01:00.0: fifo: fault 00 [READ] at
0000000000056000 engine 07 [HOST0] client 06 [HUB/HOST] reason 02 [PTE] on
channel 5 [00ff0d9000 Xwayland[3831]]
[ 9713.231930] nouveau 0000:01:00.0: fifo: channel 5: killed
[ 9713.231932] nouveau 0000:01:00.0: fifo: runlist 0: scheduled for recovery
[ 9713.231939] nouveau 0000:01:00.0: fifo: engine 5: scheduled for recovery
[ 9713.231943] nouveau 0000:01:00.0: Xwayland[3831]: channel 5 killed!
[ 9717.642691] nouveau 0000:01:00.0: fifo: SCHED_ERROR 0a [CTXSW_TIMEOUT]
[ 9717.642702] nouveau 0000:01:00.0: fifo: runlist 0: scheduled for recovery
[ 9717.642709] nouveau 0000:01:00.0: fifo: channel 3: killed
[ 9717.642714] nouveau 0000:01:00.0: fifo: engine 0: scheduled for recovery
[ 9717.643113] nouveau 0000:01:00.0: Xwayland[3831]: channel 3 killed!
[ 9719.351714] apport-gtk[119654]: segfault at 18 ip 00007f337637d194 sp
00007ffd95094dc0 error 4 in libgtk-3.so.0.2404.21[7f3376274000+385000]
[ 9719.351721] Code: c4 08 5b 5d c3 90 f3 0f 1e fa 48 8b 7f 10 48 85 ff 74 0b
e9 ce c6 ff ff 66 0f 1f 44 00 00 48 83 ec 08 48 89 d7 e8 0c 36 17 00 <48> 8b 40
18 48 8b 78 10 e8 ef 03 09 00 48 83 c4 08 48 89 c7 e9 a3
[ 9744.187533] rfkill: input handler enabled
[ 9745.940823] rfkill: input handler disabled
[ 9775.737572] rfkill: input handler enabled
[ 9777.953055] rfkill: input handler disabled
```
Related:
- https://askubuntu.com/questions/1334177/ubuntu-21-04-wayland-gimp-
black-window GIMP works fine
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