Bug 446449

Summary:	Kwin not running at 100% FPS
Product:	[Plasma] kwin	Reporter:	alexandermasokin
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED UNMAINTAINED
Severity:	normal	CC:	nate
Priority:	NOR
Version First Reported In:	5.23.4
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description alexandermasokin 2021-12-03 22:39:26 UTC

I have a laptop with a 144Hz display. I'm using the integrated Intel UHD Graphics. Animations looked super smooth, until one day I updated the system and now KDE is running at what looks like 75 or 90 FPS. I have tried the following:
 - Set Rendering backend to "OpenGL 3.1"
 - Set "Force smoothest animations"
 - Set vsync option to "Only when cheap"
 - Disable all vsync related features in my xorg.conf to increase performance
 - Install kwin-lowlatency from AUR (this seems to break some stuff such as the loading wheel spinning way too fast)

STEPS TO REPRODUCE

OBSERVED RESULT
Visible jitter during window animations or transitions

EXPECTED RESULT
Smooth animations and transitions

SOFTWARE/OS VERSIONS
Linux: 5.15.5.zen1-1-zen (64-bit)
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.88.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION

Comment 1 David Edmundson 2023-09-06 10:38:22 UTC

This bug was reported against an outdated version of KWin. We have made many changes since the. 
If the issue persists in newer versions can you reopen the bug report updating the version number.