https://bugs.kde.org/show_bug.cgi?id=486297
Bug ID: 486297
Summary: Kwin screen ID is not stable when monitors unplugged
Classification: Plasma
Product: kwin
Version: 6.0.4
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: rules
Assignee: kwin-bugs-n...@kde.org
Reporter: mitch...@ferguson.geek.nz
CC: isma...@gmail.com
Target Milestone: ---
SUMMARY
The core issue is that there is no way to write a kwin rule to move a window to
a specific monitor in a stable way. The Kwin screen IDs change whenever a
monitor is unplugged, even briefly or when PC is idle.
More background:
I have two main Firefox windows, I want one to appear on my second monitor.
With wayland, Firefox cannot do that itself, so I write a kwin window rule to
set the Firefox.
This works fine - however, my primary monitor appears to be unplugged whenever
it turns off for power saving (some kind of displayport issue, I think), so my
secondary monitor becomes kwin screen 0, and this causes my window rule to
force the Firefox window to my primary monitor, which I don't want.
STEPS TO REPRODUCE
1. Have a PC with two monitors.
2. Create a kwin window rule, forcing any window to be on screen ID 1.
3. Window moves to the secondary monitor.
4. Unplug primary monitor, then replug.
OBSERVED RESULT
Window is now forced onto primary monitor.
EXPECTED RESULT
Window should remain on secondary monitor.
SOFTWARE/OS VERSIONS
Linux: 6.8.7, Fedora Silverblue
(available in About System)
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.1.0
Qt Version: 6.7.0
ADDITIONAL INFORMATION
Ideally, there should be a way to use GUIDs or similar to refer to monitors.
Does this exist on a hardware level? Alternatively, is there any way to use a
similar mechanism to how windows will remember their monitor automatically when
said monitor is unplugged, and apply that mechanism to the screen ID in Kwin
window rules?
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