Bug 461897

Summary: Mouse Pointer leaves duplicate on second monitor when moving quickly between monitors
Product: [Plasma] kwin Reporter: kingofgamesyami
Component: wayland-genericAssignee: KWin default assignee <kwin-bugs-null>
Status: REPORTED ---    
Severity: normal CC: nate, riku, tomenglund26
Priority: NOR    
Version First Reported In: 5.26.2   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description kingofgamesyami 2022-11-16 04:30:17 UTC 
SUMMARY
When moving the mouse quickly from left monitor to right monitor, there is a duplicate left behind.
* The duplicate will not appear if you move the cursor slow enough
* The duplicate is much less likely to appear if you have some window, e.g. System Settings, covering the screen
* If the duplicate is positioned such that some portion would be rendered on both screens, only the screen without the active cursor renders it's portion of the cursor
* The duplicate will immediately disappear if the cursor is moved to the screen it is on

STEPS TO REPRODUCE
1. Have 2 identical monitors located left/right
2. Move mouse quickly from left monitor to right monitor (or vice versa) with no windows open*

*note: it can still happen with windows open, but much less frequently

OBSERVED RESULT
There is a duplicated cursor

EXPECTED RESULT
No duplicated cursor

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora Linux 37 / KDE Plasma 5.26.2
(available in About System)
KDE Plasma Version: 5.26.2
KDE Frameworks Version: 5.99.0
Qt Version: 5.15.6

ADDITIONAL INFORMATION
Graphics Platform: Wayland
Graphics Processor: NVIDIA GeForce RTX 3060 Ti
NVIDIA Driver Version: 520.56.06
Monitors: LC27G55TQWNXZA x2 (1440p, 144Hz, DisplayPort, HDR disabled).
Comment 1 Tom Englund 2023-01-17 13:16:06 UTC 
happends for me aswell.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux
(available in About System)
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8

ADDITIONAL INFORMATION
Graphics Platform: Wayland
Graphics Processor: AMD 5800h cezanne + nvidia 3060 dgpu
NVIDIA Driver Version: 525.78.01