Bug 443257 - [wayland] Cursor shadow grows unusually when launching applications
Summary: [wayland] Cursor shadow grows unusually when launching applications
Status: RESOLVED FIXED
Alias: None
Product: kwin
Classification: Plasma
Component: wayland-generic (other bugs)
Version First Reported In: 5.22.90
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2021-10-03 14:09 UTC by francaco
Modified: 2024-06-07 17:24 UTC (History)
3 users (show)

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


Attachments
video showing up the unusual cursor behaviour on wayland (3.86 MB, video/mp4)
2021-10-03 14:09 UTC, francaco
Details
Cursor shadow (947.98 KB, video/x-matroska)
2023-03-26 01:30 UTC, German P
Details

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Description francaco 2021-10-03 14:09:48 UTC
Created attachment 142119 [details]
video showing up the unusual cursor behaviour on wayland

SUMMARY

On wayland, if the cursor is not moving when launching an application from task manager or the icon-only task manager, it will start growing a thicker and darker "shadow" noticeable to the naked eye. If the cursor is moved, this "animation" is restarted, until the application that has been launched shows up. In other words, the shadow goes back to normal when the application shows up.

The behaviour is not present when launching applications from the menu.
Tested on a qemu Virtual Machine with Arch Linux, Plasma 5.22.90, Wayland session

STEPS TO REPRODUCE

1. On a wayland session with no programs open, start system settings by clicking on its icon on the task manager.
2. Leave the mouse pointer somewhere over the desktop wallpaper while the app gets launched.

OBSERVED RESULT


1. The pointer will start growing a thicker shadow (see attachment)
2. If cursor moved, the behaviour starts over
3. The behaviour finally stops when application shows up


EXPECTED RESULT

Cursor shadow doesn't change in any way while an app is being launched

SOFTWARE/OS VERSIONS
Windows: -
macOS: -
Linux/KDE Plasma: Linux kernel 5.14.8-arch1-1
KDE Plasma Version: Plasma 5.22.90
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
Comment 1 Nate Graham 2021-10-04 23:01:18 UTC
Cannot reproduce on current git master.
Comment 2 German P 2023-03-26 01:14:18 UTC
I have the same problem in real hardware.

SOFTWARE/OS VERSIONS
Linux: 6.2.8 Manjaro
KDE Plasma Version: Plasma 5.27.3 (Wayland)
KDE Frameworks Version: 5.104.0
Qt Version: 5.15.8
Comment 3 German P 2023-03-26 01:30:05 UTC
Created attachment 157582 [details]
Cursor shadow
Comment 4 Zamundaaa 2024-06-07 17:24:18 UTC
This has been fixed in Plasma 6 with some damage tracking fixes for the software cursor