[Bug 1930945] Re: ubuntu desktop - changing display configuration lost wallpaper (trap messages filled dmesg)

Yes this looks like a nouveau kernel driver bug. I recommend using the
proprietary Nvidia driver instead, but it seems your GPU only supports
driver version 340 and that's now too old to be supported in Ubuntu
21.10.

So to continue using the "nvidia quadro nvs 290" you should probably
install Ubuntu 20.04 instead where it is still supported.

** Package changed: gnome-shell (Ubuntu) => linux (Ubuntu)

** Summary changed:

- ubuntu desktop - changing display configuration lost wallpaper (trap messages filled dmesg)
+ [nouveau] ubuntu desktop - changing display configuration lost wallpaper (trap messages filled dmesg)

--
You received this bug notification because you are subscribed to linux
in Ubuntu.
Matching subscriptions: Bgg, Bmail, Nb
https://bugs.launchpad.net/bugs/1930945

Title:
[nouveau] ubuntu desktop - changing display configuration lost
wallpaper (trap messages filled dmesg)

Status in linux package in Ubuntu:
New

Bug description:
Ubuntu Desktop Impish daily test on
- hp dc7700 (c2d-e6320, 5gb, nvidia quadro nvs 290)

Changing display positions in settings. I have two monitors, one
above the other (so not the default).

I made change and it looked okay so I said keep. I noticed I was wrong
having TOP/BOTTOM displays the wrong way (detected via mouse movements
between displays) so I made another change of the TOP/BOTTOM displays
in "DISPLAYS" of GNOME settings clicked apply again & keep...

** Expected Results

On changing display orientation I expect wallpaper to be redrawn, or
remain on screen

** Actual Results

I now have BLUE background on both displays.

(this was soon changing.. but that didn't occur until I tried to
change wallpapers...)

/var/crash is empty... operation appears normal; I lost background.
lots of TRAP messages though fill `dmesg`

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: ubuntu-desktop 1.469
ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12
Uname: Linux 5.11.0-16-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu67
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.461
CurrentDesktop: ubuntu:GNOME
Date: Sat Jun 5 03:01:52 2021
LiveMediaBuild: Ubuntu 21.10 "Impish Indri" - Alpha amd64 (20210604)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-meta
UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1930945/+subscriptions