https://bugs.kde.org/show_bug.cgi?id=486827
Bug ID: 486827
Summary: Fullscreen windows wiggle when losing/gaining focus
Classification: Plasma
Product: kwin
Version: 6.0.4
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: core
Assignee: kwin-bugs-n...@kde.org
Reporter: burne...@gmail.com
Target Milestone: ---
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SUMMARY
Many fullscreen windows, such as games, "wiggle" when losing and regaining
focus. This seems to be because when the window loses focus, it's moved above
the taskbar for one frame before being repositioned to the bottom of the
screen. This doesn't occur with all fullscreen windows; it consistently occurs
with some games (Eve Online and Noita, for example) running under Wine, whereas
many other fullscreen applications (Firefox, mpv, Jellyfin, the game Factorio)
do not trigger this.
A workaround for the issue is to un-fullscreen the window (right click in
taskbar > More > untick Fullscreen), manually move it down so the top left
corner of the window is in the top left corner of the screen, and then
re-fullscreen it.
STEPS TO REPRODUCE
1. Open an affected fullscreen application (e.g. the game Noita)
2. Bring up the taskbar (e.g. by pressing meta to open the application
launcher, or by alt-tabbing to another window)
OBSERVED RESULT
The affected window is moved above the taskbar for one frame before being moved
back down.
EXPECTED RESULT
The affected window doesn't move and instead just layers underneath the
taskbar.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 40, kernel 6.8.8-300, Wayland session
(available in About System)
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.1.0
Qt Version: 6.7.0
ADDITIONAL INFORMATION
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