Bug 445638 - Black background when window is resized on X11 with QtQuick hardware rendering
Summary: Black background when window is resized on X11 with QtQuick hardware rendering
Status: CONFIRMED
Alias: None
Product: systemsettings
Classification: Applications
Component: general (show other bugs)
Version: 5.23.3
Platform: Other Other
: NOR minor
Target Milestone: ---
Assignee: Plasma Bugs List
URL:
Keywords: X11-only
Depends on:
Blocks:
 
Reported: 2021-11-17 09:46 UTC by popov895
Modified: 2025-02-24 17:58 UTC (History)
2 users (show)

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

Attachments
Black background (1.90 MB, video/mp4)
2021-11-17 09:46 UTC, popov895 		Details
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Description popov895 2021-11-17 09:46:58 UTC 
Created attachment 143658 [details]
Black background

SUMMARY

When resizing the window, a black background appears at the top and right. 

SOFTWARE/OS VERSIONS

Operating System: KDE neon 5.23
KDE Plasma Version: 5.23.3
KDE Frameworks Version: 5.88.0
Qt Version: 5.15.3
Kernel Version: 5.11.0-40-generic (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i5-8250U CPU @ 1.60GHz
Graphics Processor: Mesa Intel® UHD Graphics 620
Comment 1 Nate Graham 2021-11-23 21:04:27 UTC 
Hmm, cannot reproduce with git master that same GPU, and a slightly more powerful CPU.

Does it reproduce on Wayland? Does it reproduce if compositing is turned off? What compositing backend are you using in the Compositor KCM?
Comment 2 popov895 2021-11-23 23:00:26 UTC 
I can't reproduce it on Wayland. I can't reproduce it in a window other than "System Preferences". Also I can't reproduce it in the "Icon View" mode. I can reproduce it with any compositing backend, as well as if compositing is turned off.
Comment 3 popov895 2021-11-23 23:07:52 UTC 
Also I can reproduce it on openSUSE with Plasma 5.23.2, Frameworks 5.87.0 and kernel 5.15.2.
Comment 4 popov895 2021-11-24 08:28:56 UTC 
I can reproduce this issue even on Plasma 5.21.5, so it's pretty old.
Comment 5 popov895 2021-11-24 13:43:29 UTC 
Switching the Qt Quick scenegraph backend to the QSGRendererInterface::Software fixes the issue for me.
Comment 6 TraceyC 2025-02-24 17:58:55 UTC 
Adding the x11-only keyword