Bug 501053

Summary: Adaptive sync stutter when a steam notification shows.
Product: [Plasma] kwin Reporter: Angel <a.cvetkov9ml>
Component: wayland-genericAssignee: KWin default assignee <kwin-bugs-null>
Status: REPORTED ---    
Severity: normal CC: nate
Priority: NOR    
Version First Reported In: 6.3.2   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Angel 2025-03-04 11:58:11 UTC 
SUMMARY
Whenever a steam notification appears, there is a stutter, and when it hides there is another stutter. Also happens in mpv in fullscreen.

OBSERVED RESULT
Stutter

EXPECTED RESULT
No stutter

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.13.5-arch1-1
KDE Plasma Version: 6.3.2
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2

ADDITIONAL INFORMATION
Disabling Adaptive sync fixes the issue.
Comment 1 Angel 2025-03-04 12:00:52 UTC 
(In reply to Angel from comment #0)
> SUMMARY
> Whenever a steam notification appears, there is a stutter, and when it hides
> there is another stutter. Also happens in mpv in fullscreen.
> 
> OBSERVED RESULT
> Stutter
> 
> EXPECTED RESULT
> No stutter
> 
> SOFTWARE/OS VERSIONS
> Linux/KDE Plasma: 6.13.5-arch1-1
> KDE Plasma Version: 6.3.2
> KDE Frameworks Version: 6.11.0
> Qt Version: 6.8.2
> 
> ADDITIONAL INFORMATION
> Disabling Adaptive sync fixes the issue.

Specifically when you move your cursor in mpv. The steam notification issue is probably because it overlays the fullscreen application.