[plasmashell] [Bug 498176] On X11, black desktop and missing panel on 2nd screen when switching monitor inputs or wake from monitor sleep

[Kalinda]

https://bugs.kde.org/show_bug.cgi?id=498176

--- Comment #2 from Kalinda  ---
(In reply to Nate Graham from comment #1)
> Does it still happen on Wayland?

I just checked and it does not.

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[plasmashell] [Bug 496926] On X11, desktop is black/missing after resuming from suspend or hibernation until plasmashell is restarted or TTYs are switched

[Kalinda]

https://bugs.kde.org/show_bug.cgi?id=496926

--- Comment #28 from Kalinda  ---
Don't know which GPU driver everyone is using but when I swapped to an nvidia
card the issue went away. Then, this morning, when I put back in my AMD card,
it returned.

I'm using amdgpu for my AMD card, an old RX 570, and nvidia-open for my GTX
1650. Used X11 with both.

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[plasmashell] [Bug 498176] New: Missing dekstop/panel on 2nd screen when switching monitor inputs or wake from monitor sleep.

[Kalinda]

https://bugs.kde.org/show_bug.cgi?id=498176

Bug ID: 498176
   Summary: Missing dekstop/panel on 2nd screen when switching
monitor inputs or wake from monitor sleep.
Classification: Plasma
   Product: plasmashell
   Version: 6.2.5
  Platform: Arch Linux
OS: Linux
Status: REPORTED
  Severity: normal
  Priority: NOR
 Component: Panel
  Assignee: plasma-b...@kde.org
  Reporter: kali...@andontie.net
CC: niccolo.venera...@gmail.com
  Target Milestone: 1.0

Created attachment 177051
  --> https://bugs.kde.org/attachment.cgi?id=177051&action=edit
journalctl from after I switch back to HDMI

SUMMARY
I switch inputs on my second monitor when I want to use my GPU passthrough VM,
which uses displayport while my Linux uses HDMI. Since Plasma 6.2.4, switching
back to the HDMI gives me a black screen. I can still move my mouse on it, drag
windows over to it, and alt+tab, but the plasma desktop is completely gone from
the monitor. I can't right click, either. The only way to bring it back is to
go into the settings and switch primary monitor to secondary and then back.
Running 'plasmashell --replace' also fixes it.

This issue can also occur when waking the monitor from sleep. Usually it'll
happen after it's been asleep for a while, but switching inputs is a guaranteed
way to reproduce. 

I'm using Xorg. I've attached the journalctl that happens after I switch the
input back to HDMl, Please let me know if other logs are needed.

Thanks!

STEPS TO REPRODUCE
1. Switch monitor input from Linux screen to something else.
2. Switch it back to Linux screen.

OBSERVED RESULT
Desktop background and panels are gone, screen is black. Mouse and windows
still work on it, as does alt-tab.

EXPECTED RESULT
The screen looks the same as it did before the input switch when changing back.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
KDE Plasma Version: 6.5.2
KDE Frameworks Version: 6.9.0
Qt Version: 6.8.1

ADDITIONAL INFORMATION
The multiple 'kde.plasmashell: requesting unexisting screen available rect -1'
lines in the journalctl jump out at me as maybe being something related to the
bug.

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