Bug 515006

Summary:	Cover Switch task switcher (alt-tab) animation is faster at higher refresh rates
Product:	[Plasma] kwin	Reporter:	ctj9512
Component:	effects-tabbox	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	REPORTED ---
Severity:	normal
Priority:	NOR
Version First Reported In:	6.5.90
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description ctj9512 2026-01-24 09:13:28 UTC

SUMMARY

Cover Switch task switcher (alt-tab) animation is faster at higher refresh rates

STEPS TO REPRODUCE
1. Use high refresh rate monitor (240Hz)
2. Use Cover Switch alt-tab with animation

OBSERVED RESULT

When using 240Hz, the animation appears faster than with 120Hz. 

Strangely, the exact speed depends on the focused window when the animation starts. For example, with glxgears maximized, the animation is very fast, but with glxgears fullscreen, the animation is a lot slower. The speed persists even with alt held down and tab is repeatedly pressed to cycle through multiple windows.

EXPECTED RESULT

The animation speed should remain the same.

SOFTWARE/OS VERSIONS

Operating System: Arch Linux
KDE Plasma Version: 6.5.90
KDE Frameworks Version: 6.22.0
Qt Version: 6.11.0
Kernel Version: 6.18.6-arch1-1 (64-bit)
Graphics Platform: Wayland
Processors: 24 × Intel® Core™ Ultra 9 275HX
Memory: 96 GiB of RAM (93.7 GiB usable)
Graphics Processor 1: NVIDIA GeForce RTX 5080 Laptop GPU/PCIe/SSE2
Graphics Processor 2: NVIDIA GeForce RTX 5080 Laptop GPU/PCIe/SSE2

ADDITIONAL INFORMATION