https://bugs.kde.org/show_bug.cgi?id=474488
Bug ID: 474488
Summary: Panel flickering at the top of some fullscreen games
Classification: Plasma
Product: plasmashell
Version: 5.27.4
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: Panel
Assignee: plasma-b...@kde.org
Reporter: heroshihero...@tutanota.com
CC: niccolo.venera...@gmail.com
Target Milestone: 1.0
SUMMARY
That's a old bug that I've never found a report about. Basically when using
some specific applications, firstly games, on fullscreen, when you do some
action like open a menu or you're transacting from an area to other, the panels
start to flicker/flashing above the game window.
STEPS TO REPRODUCE
1. Open the game/application at fullscreen, I've tested this at Tales of
Beseria (Wine/Proton).
2. Do some actions like open a menu, load your save, go to other area at the
game (At Tales of Beseria)
3. The bar starts to flicker above the game window
OBSERVED RESULT
The bar starts to flicker above the window as you can see at this video of
other game:
https://old.reddit.com/r/kde/comments/pz19hr/how_to_fix_taskbar_flicker_in_games_i_have/
EXPECTED RESULT
The panel behave like at other desktop environments and don't flicker at the
fullscreen window.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora Linux
(available in About System)
KDE Plasma Version: 5.24.7
KDE Frameworks Version: 5.104.0
Qt Version: 5.15.8
ADDITIONAL INFORMATION
That problem can also happen with native linux games/applications.
When Kwin compositor is enabled at X11 or at Wayland, we have a variation of
this bug where the fullscreen window shrink horizontally.
The only way to prevent this bug is setting the panel to auto-hide, or allowing
the windows to appear above the panel.
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