https://bugs.kde.org/show_bug.cgi?id=470799
Bug ID: 470799
Summary: Recent regression: KVM switch setup - toggling back to
KDE system causes black wallpaper, floating appmenu,
missing Task Manager
Classification: Plasma
Product: kwin
Version: 5.27.5
Platform: unspecified
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: kde.1m...@simplelogin.com
Target Milestone: ---
Created attachment 159543
--> https://bugs.kde.org/attachment.cgi?id=159543&action=edit
Screenshot of primary monitor with hovering appmenu, missing Task Manager,
black background
SUMMARY
***
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***
In a multi-monitor setup with KVM switch, when switching from another system
(Windows 11 Enterprise) to a KDE system, desktop wallpaper becomes black on
both monitors, appmenu is floating, and Task Manager is missing on both
monitors. This seems to be a regression as it worked fine about 1-2 months ago.
If you reboot the KDE system, the issues disappear until the next time you
toggle the KVM switch back
STEPS TO REPRODUCE
1. With the KVM switch toggled to the KDE system, toggle to another system
2. Wait 30 seconds
3. Toggle back to the KDE system
OBSERVED RESULT
The appmenu floats when brought up by pressing the Meta/Win key, the Task
Manager is missing, and the background is black
EXPECTED RESULT
Background is not black, no floating appmenu, no missing Task Manager
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux Kinoite 38.20230608.0
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.106.0
Qt Version: 5.15.9
Kernel Version: 6.3.5-200.fc38.x86_64 (64-bit)
Graphics Platform: Wayland
Graphics Processor: Mesa Intel® Arc
ADDITIONAL INFORMATION
Primary Monitor:
27", tried in both 1920x1080 and 4K resolutions
Secondary Monitor:
22", 1920x1080
KVM Switch:
Level 1 Techs: 1.4 Display Port KVM Switch - Dual Monitor - Two Computer
(SKU: SQ8628028)
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