https://bugs.kde.org/show_bug.cgi?id=447388

            Bug ID: 447388
           Summary: Wallpaper reset erratically after upgrade to Plasma
                    5.23
           Product: plasmashell
           Version: 5.23.4
          Platform: Gentoo Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: Multi-screen support
          Assignee: aleix...@kde.org
          Reporter: mz...@o2.pl
                CC: plasma-b...@kde.org
  Target Milestone: 1.0

SUMMARY

Ever since upgrading to Plasma 5.23, one of three things will happen on a power
cycle:
a) I am greeted with a black background instead of the wallpaper
b) the wallpaper is reset to the default one
(/usr/share/wallpapers/Next/contents/images/1920x1080.png)
c) more rarely the wallpaper is reset to one of the included I'd used previous
(e.g. /usr/share/wallpapers/summer_1am/contents/images/2560x1600.jpg)

The interesting thing is that the proper wallpaper will restore itself, if I
wait about 20-30 seconds.

I've tried deleting my plasma-org.kde.plasma.desktop-appletsrc and
kactivitymanagerdrc, to no avail.

My setup is a 1080p monitor connected via DVI and a 4k TV connected via HDMI. I
have the latter set to 1080p and mirroring the primary 1080p screen.

This seems similar to https://bugs.kde.org/show_bug.cgi?id=443832. However, I'm
on nvidia-drivers. And that bug was filed against Plasma 5.22, whereas my issue
only started with 5.23 and downgrading to 5.22 indeed makes the issue go away.

One more pertinent piece of information: when I unplug the tv, the bug seems to
go away. Hence why I've filed this against multi-screen support.

STEPS TO REPRODUCE
1. Set custom wallpaper
2. Reboot

OBSERVED RESULT
The wallpaper is replaced by a blank background or the default wallpaper, then
fixes itself after some seconds have passed

EXPECTED RESULT
The proper wallpaper is visible from the start

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
Operating System: Gentoo Linux 2.8
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.89.0
Qt Version: 5.15.2
Kernel Version: 5.15.10-gentoo (64-bit)
Graphics Platform: X11
Processors: 12 × AMD Ryzen 5 3600 6-Core Processor
Memory: 23.5 GiB of RAM
Graphics Processor: NVIDIA GeForce GT 1030/PCIe/SSE2

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