https://bugs.kde.org/show_bug.cgi?id=447876
Bug ID: 447876
Summary: [Wayland] Using window rules to pin windows to
specific virtual desktops causes "ghost" windows to
appear on the pager
Product: kwin
Version: unspecified
Platform: Archlinux Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: platform-wayland
Assignee: kwin-bugs-n...@kde.org
Reporter: stu...@pinamartins.com
Target Milestone: ---
Created attachment 145076
--> https://bugs.kde.org/attachment.cgi?id=145076&action=edit
A screenshot showing the window rules' settings that cause the issue
SUMMARY
***
I have setup "Window Rules" so that some of my apps are "restricted" to a
specific virtual desktop, eg. Firefox to Virtual Desktop 3 (screenshot
attached).
Under X11, if I am on Virtual Desktop 1, and launch firefox, all firefox
windows are launched in Virtual Desktop 3, which is reflected on the pager
panel widget. This is the expected behavior. Doing so under wayland, however,
results in firefox windows launching on Virtual Desktop 3, but a "ghost" window
also appearing on the virtual desktop I have launched it from. Moving the
"ghost" window in the pager to a different Virtual Desktop results in moving
the actual window there. A "ghost" window remains on the pager where the
actual window actually was. Moving the actual window using the pager does not
remove the "ghost" window.
***
STEPS TO REPRODUCE
1. Create multiple Virtual Desktops and activate the pager widget
2. Set window rules as in the attached screenshot
3. Log in using a wayland session
4. Launch firefox from Virtual Desktop 1
5. Watch how the pager widget makes firefox show up on both Virtual Desktops,
even though the window only exists on Virtual Desktop 3
6. This does not occur under X11
OBSERVED RESULT
When window rules are active under a wayland session, the pager makes copies of
windows on the wrong virtual desktops
EXPECTED RESULT
The pager widget displays the windows only on the desktop they currently exist
in, just like in a X11 session.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma:
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.89.0
Qt Version: 5.15.2
ADDITIONAL INFORMATION
I can reproduce the issue on two independent systems
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