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

[Ubuntu QA Website]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1930945

** Tags added: iso-testing

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https://bugs.launchpad.net/bugs/1930945

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

Status in ubuntu-meta 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)

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