Bug 495695 - Mouse Stutter During Heavy Disk IO
Summary: Mouse Stutter During Heavy Disk IO
Status: CONFIRMED
Alias: None
Product: kwin
Classification: Plasma
Component: performance (show other bugs)
Version: 6.2.2
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2024-11-01 17:49 UTC by dofficialgman
Modified: 2024-11-04 20:47 UTC (History)
2 users (show)

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Description dofficialgman 2024-11-01 17:49:15 UTC 
SUMMARY
Mouse movement stutter/freezes during heavy disk IO (eg: during application upgrades from the software center).

STEPS TO REPRODUCE
1. Use KDE Neon 24.04 (Wayland)
2. Perform an application upgrade using the software center
3. attempt to move mouse and observe it freeze for brief moments multiple times during the upgrade

OBSERVED RESULT
Mouse stutters

EXPECTED RESULT
Mouse does not stutter

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Neon 6.2
KDE Plasma Version: 6.2.2
KDE Frameworks Version: 6.7.0
Qt Version: 6.8.0

ADDITIONAL INFORMATION
I believe this to be a regression as I do not remember experiencing this issue on Plasma 6.1 and earlier versions.
Comment 1 Nate Graham 2024-11-04 17:47:56 UTC 
Are you by any chance forcing the use of the software cursor? What does `env | grep KWIN_FORCE_SW_CURSOR` in a terminal window say?
Comment 2 dofficialgman 2024-11-04 20:47:12 UTC 
(In reply to Nate Graham from comment #1)
> Are you by any chance forcing the use of the software cursor? What does `env
> | grep KWIN_FORCE_SW_CURSOR` in a terminal window say?

I am not forcing the use of the software cursor. There is no such variable set in the environment (the output of the command is nothing).