Bug 504885 - Duplicate mouse cursor appears when mouse at rest
Summary: Duplicate mouse cursor appears when mouse at rest
Status: RESOLVED DUPLICATE of bug 504239
Alias: None
Product: kwin
Classification: Plasma
Component: compositing (other bugs)
Version First Reported In: 6.3.4
Platform: openSUSE Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-05-27 20:32 UTC by kanerbw
Modified: 2025-05-28 21:11 UTC (History)
3 users (show)

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


Attachments
The normal mouse and the duplicate mouse. The line underneath is part of the graphical artifacting (1.02 MB, image/jpeg)
2025-05-27 20:34 UTC, kanerbw
Details

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Description kanerbw 2025-05-27 20:32:15 UTC
SUMMARY
At random times, if I leave the mouse still for a few seconds, it will occasionally make a second one appear, sometimes with some other small graphical artifcating. When I move the mouse, the duplicate mouse and artifacting goes away until I stop moving the mouse again. Then, it reappears.

STEPS TO REPRODUCE
1. Leave mouse still for about 1-2 seconds.
2. 
3. 

OBSERVED RESULT
After about a second, a duplicate mouse cursor appears to the right of the first one. Sometimes, there is also additional visual artifacting around the mouse cursor area.

EXPECTED RESULT
The mouse cursor to not be duplicated.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.14.6-1-default (64-bit)
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.13.0
Qt Version: 6.9.0

ADDITIONAL INFORMATION
Troubleshooting steps I have taken. None have resolved the issue:
- Using X11 
- Creating a new user with default KDE Plasma
- Adjusting the scaling on my monitor to 125%, applying, then reverting back to 100% and applying
- Adjusting the (1440p) monitor resolution to 1080p

System info:

OS: openSUSE Tumbleweed x86_64
Host: MS-7D78 (1.0)
Kernel: Linux 6.14.6-1-default
Uptime: 2 hours, 18 mins
Packages: 2987 (rpm), 30 (flatpak)
Shell: zsh 5.9
Display (XF270HU): 2560x1440 @ 144 Hz in 27" [External]
DE: KDE Plasma 6.3.5
WM: KWin (Wayland)
WM Theme: Breeze
Theme: Breeze (Dark) [Qt], Breeze-Dark [GTK2], Breeze [GTK3/4]
Icons: breeze-dark [Qt], breeze-dark [GTK2/3/4]
Font: Noto Sans (10pt) [Qt], Noto Sans (10pt) [GTK2/3/4]
Cursor: breeze (24px)
Terminal: konsole 25.4.1
Terminal Font: MesloLGS NF (11pt)
CPU: AMD Ryzen 7 7700X (16) @ 5.58 GHz
GPU 1: AMD Radeon RX 7900 XTX [Discrete]
GPU 2: AMD Raphael [Integrated]
Memory: 5.75 GiB / 30.50 GiB (19%)
Swap: 563.38 MiB / 2.00 GiB (28%)
Disk (/): 552.39 GiB / 930.51 GiB (59%) - btrfs
Comment 1 kanerbw 2025-05-27 20:34:18 UTC
Created attachment 181794 [details]
The normal mouse and the duplicate mouse. The line underneath is part of the graphical artifacting
Comment 2 TraceyC 2025-05-28 16:36:25 UTC
I have not seen this in OpenSuse Tumbleweed in a Wayland session, or git-master Wayland

Please check for updates on your system. In an OpenSuse Tumbleweed VM, I see KDE Frameworks 6.14.0, and your reported version is 6.13.0.

Can you reproduce this with an up to date system?
If you can, does it also happen in a Wayland session as well?
Comment 3 kanerbw 2025-05-28 16:58:07 UTC
(In reply to TraceyC from comment #2)
> I have not seen this in OpenSuse Tumbleweed in a Wayland session, or
> git-master Wayland
> 
> Please check for updates on your system. In an OpenSuse Tumbleweed VM, I see
> KDE Frameworks 6.14.0, and your reported version is 6.13.0.
> 
> Can you reproduce this with an up to date system?
> If you can, does it also happen in a Wayland session as well?

I refreshed my repositories, ran "zypper dup," and restarted my machine, and I'm still on KDE Frameworks 6.13.0. The problem still persists. The specific TW release i have is OpenSUSE Tumbleweed 20250522.

This is all on Wayland, although I've confirmed it in X11, too.
Comment 4 TraceyC 2025-05-28 19:07:26 UTC
Thanks for confirming this occurs on both Wayland and X11. KDE Frameworks was updated for Tumbleweek, as mentioned in this post from 16 May 2025.

https://lists.opensuse.org/archives/list/factory@lists.opensuse.org/message/6AS5UW62LZNSXJZGZUFQDMD6G7N5OTPD/

If you check for updates in Discover, does it update Frameworks? It seems like there may be something wrong with the updates or something else in your system's configuration. Please make sure your system receives this update and re-test with Frameworks 6.14. Thanks.
Comment 5 kanerbw 2025-05-28 20:39:10 UTC
(In reply to TraceyC from comment #4)
> Thanks for confirming this occurs on both Wayland and X11. KDE Frameworks
> was updated for Tumbleweek, as mentioned in this post from 16 May 2025.
> 
> https://lists.opensuse.org/archives/list/factory@lists.opensuse.org/message/
> 6AS5UW62LZNSXJZGZUFQDMD6G7N5OTPD/
> 
> If you check for updates in Discover, does it update Frameworks? It seems
> like there may be something wrong with the updates or something else in your
> system's configuration. Please make sure your system receives this update
> and re-test with Frameworks 6.14. Thanks.

I swear I experienced this bug with a new user, but I tried logging into a new user again today, and the issue went away. 

When I switched back to my profile, I noticed that in Display Configuration, Color accuracy was set to Prefer color accuracy. When I switched it back to Prefer efficiency (like it is by default), the big immediately stopped. When I switch back to Prefer color accuracy, the bug comes back. 

This configuration really seems to be the source of the issue.
Comment 6 TraceyC 2025-05-28 21:11:11 UTC
I'm still not able to reproduce this on an OpenSuse VM, even with the Display Configuration (Wayland) set to Prefer efficiency

After a little more digging, I found there is another report of this in bug 504239
That user has KDE Frameworks Version: 6.14.0

I'm going to mark this as a duplicate of the older report, please follow that for updates.

*** This bug has been marked as a duplicate of bug 504239 ***