Bug 513142

Summary: The preview/thumbnail of an application window does not display when the Nvidia graphics card is active.
Product: [Frameworks and Libraries] KPipeWire Reporter: specialty.unshaven586
Component: generalAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: minor CC: aleixpol, kde, nate
Priority: NOR    
Version First Reported In: 6.5.3   
Target Milestone: ---   
Platform: Bazzite   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:
Attachments: A photo showing the bug in question.

Description specialty.unshaven586 2025-12-09 21:55:53 UTC
Created attachment 187474 [details]
A photo showing the bug in question.

SUMMARY

Hello, when I hover over an application icon, a preview of the window normally appears, but not when the Nvidia graphics card is active. Instead, I just see a black square.

Sometimes when I start up, my system is in llvmpipe mode instead of selecting the Nvidia driver, and that's how I realized that when I am on llvmpipe, window previews are displayed, but when the Nvidia driver is loaded, window previews are no longer displayed.

It's not a major problem, but it's still annoying in some situations not to have a quick preview of an application window via a thumbnail. I hope you can fix this issue. Have a nice day!

STEPS TO REPRODUCE
1. Have an Nvidia graphics card and be able to switch to llvmpipe to make a comparison.
2. Hover the mouse over an icon of a running application and see if the preview/thumbnail of an application window is displayed.

OBSERVED RESULT

A black square appears instead of the window preview.

EXPECTED RESULT

The window preview should display what the application is currently running.

SOFTWARE/OS VERSIONS

Linux/KDE Plasma: 6.17.7-ba19.fc43.x86_64 (64-bit)
KDE Plasma Version: 6.5.3
KDE Frameworks Version: 6.20.0
Qt Version: 6.10.1

ADDITIONAL INFORMATION

I'm on Wayland.
Comment 1 Nate Graham 2025-12-10 16:36:28 UTC

*** This bug has been marked as a duplicate of bug 513100 ***