https://bugs.kde.org/show_bug.cgi?id=469034
Bug ID: 469034
Summary: Windows are lost in missing displays when detaching
external monitors on Wayland
Classification: Plasma
Product: kwin
Version: 5.27.4
Platform: Archlinux
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: multi-screen
Assignee: kwin-bugs-n...@kde.org
Reporter: adr.fant...@gmail.com
Target Milestone: ---
SUMMARY
I use a 3x3 virtual desktop setup on Wayland.
Very often, after detaching external monitors, windows are "lost" in them,
meaning that they are still placed on phantom monitors that do not exist
anymore.
STEPS TO REPRODUCE
1. Set virtual desktop arrangement to 3x3 (I have not verified this with other
desktop arrangements)
2. Connect external monitors (I use 3 monitors side-by-side)
3. Open a bunch of windows (e.g. several browser windows) in different virtual
desktops and screens
4. Detach external display(s)
OBSERVED RESULT
Some windows are hidden/lost, as if they are not moved away from detached
displays.
Most of the time, but not always, minimising and maximising them a couple of
times from the panel restores them to the correct screen. Sometimes, they need
to be forcefully closed and reopened (losing potential work done).
When this happens, the Desktop Pager widget even shows these additional "lost"
windows in a separate display, outside of the 3x3 Virtual Desktops matrix, as
an additional virtual desktop in the first row (so instead of 3 virtual
displays per row, I have 4 in the first, then 3 and 3)
EXPECTED RESULT
All windows are properly moved to the remaining display.
SOFTWARE/OS VERSIONS
Linux: Archlinux
KDE Plasma Version: 5.27.4 on Wayland
KDE Frameworks Version: 5.105.0
Qt Version: 5.15.9
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