Problem seems to be fixed now. Not sure at what point it stopped being
broken but the problem is no longer exhibited on Ubuntu 20.04.3 on a
5.11.0-41-generic kernel with Nouveau xserver-xorg-video-nouveau
1:1.0.16-1 with Gnome 1:3.30+2 and GDM3 3.36.3-0ubuntu.20.04.4 using X11
not wayland.
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I am seeing a similar issue with a second monitor plugged in. I am
using nouveau and it crashes the X server and logs me out. I have
attached a log of what happened. This is NOT connected with a screen
lock, it happens randomly.
Display is:
*-display
description: VGA
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-signed-hwe-5.8 (Ubuntu)
Status: New => Confirmed
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This journal log contains the nouveau backtrace after locking the
computer
** Attachment added: "Journal log with kernel backtrace"
https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.8/+bug/1933609/+attachment/5506901/+files/kernel_crash.log
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