Bug 510144 - Mouse pointer keeps stopping for a few seconds with multiple windows open and 1000Hz mouse polling rate
Summary: Mouse pointer keeps stopping for a few seconds with multiple windows open and...
Status: NEEDSINFO WAITINGFORINFO
Alias: None
Product: kwin
Classification: Plasma
Component: input (other bugs)
Version First Reported In: 6.4.5
Platform: Arch Linux Linux
: NOR major
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords: efficiency-and-performance
Depends on:
Blocks:
 
Reported: 2025-10-01 21:42 UTC by mf.finland707
Modified: 2025-10-02 15:12 UTC (History)
4 users (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:

Attachments
Add an attachment

Note You need to log in before you can comment on or make changes to this bug.
Description mf.finland707 2025-10-01 21:42:58 UTC 
SUMMARY
Sometimes when moving my mouse, the cursor keeps freezing for a few seconds.

STEPS TO REPRODUCE
1. Use a Logitech G305 mouse.
2. Open a few windows

OBSERVED RESULT
The pointer goes stuck for a few seconds periodically as long as there are too many windows open.

EXPECTED RESULT
The pointer should not get stuck.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.18.0
Qt Version: 6.9.2
Kernel Version: 6.16.8-arch3-1 (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 5500
Memory: 16 GiB of RAM (15.5 GiB usable)
Graphics Processor: AMD Radeon RX 6600

ADDITIONAL INFORMATION
180Hz and 75Hz monitors
The bug could only need a 1000Hz mouse and not the specific model.
Comment 1 TraceyC 2025-10-02 15:12:24 UTC 
Can you give us a screenshot of `top` or the tool of your choice when the bug is happening?

I've also seen this on 6.4.5 with a Logitech G502 Lightspeed mouse, but had chalked it up to an app / electron since Obsidian Notes was always at the top of the process list, and the stuttering would stop happening if I closed it.