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** Background

Performing a QA-test install (Lubuntu impish) to
- hp dc7700 (c2d-e6320, 5gb, nvidia quadro nvs 290)

testcase: install using existing partition (sda1)

On the box existed
- Lubuntu focal.3  (system selected for replacing with impish)
- Xubuntu focal.3  (an install-alongside or auto-resize QA-test)
- Kubuntu focal.3  (another install-alongside/auto-resize QA-test)

I'm booting the Kubuntu focal.3 expecting no changes.. The QA-test done
days ago was good and I passed it without issues. This will be it's
first login after that initial-post-install checks where I noticed
nothing wrong.

** What I see

My displays are setup to match my config (one display set above the
other), however

wallpaper on my.bottom display is present & looks normal

NO WALLPAPER appears on my.top display

right-click on my.bottom display is pulling up menu allowing me
Create.New..Configure.Desktop as expected.

right-click on my.TOP display however does nothing

Moving windows around is perfect..

** ACTUAL BEHAVIOR

Wallpaper on both monitors, not just my.bottom display
Right click of background pulls up menu on both displays, not just my.bottom

** EXPECTED BEHAVIOR

Wallpaper on both monitors, and right-click works both displays.

(It did this in the initial boot after QA-test install; this is now 2nd
boot of system which is first time I've noted this behavior)

** Note (LXQt has exhibited same behavior in focal)

This thought is likely red herring - it reminded me of 
https://bugs.launchpad.net/openbox/+bug/1845756 which is tagged against openbox 
thus doesn't apply here. Originally I said "I've had this behavior before with 
LXQt & I can't recall if this was put down to an issue in Qt 5.12.8 (fixed in 
later releases), or openbox (which won't apply here of course).."
--

I'll complete this QA-test and aim to return and add more later.
This box is only used for QA-test installs, so system may not exist for very 
long.  It's likely more useful if I repeated this with Kubuntu impish...  but 
vanvugt's comment on 
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1930945 implies that's of 
limited value 

This bug MAYBE should be filed against linux/nouveau

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: plasma-workspace 4:5.18.5-0ubuntu0.1
ProcVersionSignature: Ubuntu 5.11.0-27.29~20.04.1-generic 5.11.22
Uname: Linux 5.11.0-27-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Sat Aug 28 13:32:25 2021
InstallationDate: Installed on 2021-08-26 (2 days ago)
InstallationMedia: Kubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 
(20210819.1)
SourcePackage: plasma-workspace
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal
-- 
kubuntu focal.3 no wallpaper on one display, right-click not working on that 
display
https://bugs.launchpad.net/bugs/1941937
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