Bug 468656 - Duplicate mouse cursor left-over in the second monitor
Summary: Duplicate mouse cursor left-over in the second monitor
Status: RESOLVED FIXED
Alias: None
Product: kwin
Classification: Plasma
Component: wayland-generic (other bugs)
Version First Reported In: 5.27.4
Platform: Fedora RPMs Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2023-04-18 15:23 UTC by Alessandro Astone
Modified: 2025-05-29 15:32 UTC (History)
2 users (show)

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

Attachments
video of the bug (759.32 KB, video/mp4)
2023-04-18 15:23 UTC, Alessandro Astone 		Details
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Description Alessandro Astone 2023-04-18 15:23:40 UTC 
Created attachment 158191 [details]
video of the bug

SUMMARY
When nothing is causing a monitor to refresh its contents, it might happen that the last drawn frame includes the mouse cursor even after it has crossed over to a different monitor.
Video capture in the attachments.

STEPS TO REPRODUCE
1. Set a low polling rate on the mouse, if possible. I can reproduce on the default 125Hz
2. Close all windows on monitor A
3. Move the mouse quickly from monitor A to monitor B

OBSERVED RESULT
Monitor A still shows a mouse cursor although I'm moving the cursor in monitor B

EXPECTED RESULT
Monitor A shows no cursor

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Fedora 37 KDE
(available in About System)
KDE Plasma Version: 5.27.4
KDE Frameworks Version: 5.104.0
Qt Version: 5.15.8

ADDITIONAL INFORMATION
Wayland on nvidia
Comment 1 TraceyC 2025-05-28 21:22:48 UTC 
I haven't seen this on Wayland in Plasma 6, on a system with an nvidia GPU. Many things have been updated and improved since this was opened. Have you seen this on your system with Plasma 6.3.5 or later?
Comment 2 Alessandro Astone 2025-05-29 08:08:46 UTC 
Right; I have not seen this recently.
Comment 3 TraceyC 2025-05-29 15:32:49 UTC 
Thanks for confirming!