Created attachment 178236 [details] Bug demonstration *** If you're not sure this is actually a bug, instead post about it at https://discuss.kde.org If you're reporting a crash, attach a backtrace with debug symbols; see https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports Please remove this comment after reading and before submitting - thanks! *** SUMMARY STEPS TO REPRODUCE 1. Set color accuracy to "Prefer Color Accuracy" 2. Try to spam a applet button, like start menu OBSERVED RESULT Weird flashy colors EXPECTED RESULT Stable applet view SOFTWARE/OS VERSIONS Linux/KDE Plasma: Arch Linux KDE Plasma Version: 6.3.0 KDE Frameworks Version: 6.10.0 Qt Version: 6.8.2 ADDITIONAL INFORMATION Doesn't happen on "Prefer Efficiency"
If you disable blur and background contrast effect, is it still reproducible?
Also, what GPU are you using?
(In reply to Zamundaaa from comment #2) > Also, what GPU are you using? Hi! I have a laptop with an integrated Intel UHD 630 GPU
(In reply to Vlad Zahorodnii from comment #1) > If you disable blur and background contrast effect, is it still reproducible? Hey Vlad! I have tested, and here are my results: Blur on Background Contrast off: still same issue Blurr off Background Contrast off: issue gone Blurr off Background Contrast on: issue gone
*** Bug 500304 has been marked as a duplicate of this bug. ***
*** Bug 500658 has been marked as a duplicate of this bug. ***
*** Bug 499982 has been marked as a duplicate of this bug. ***
I managed to replicate the issue on my Intel laptop, but not on AMD, so I suspect this may be a driver bug around 16 bit buffers. I'll do some more debugging to find out if another buffer format works better. Is there anyone that has the problem on not-Intel?
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/7268
Git commit b81a8635dd40380bbd4e39d4584221caca1abd8f by Xaver Hugl. Committed on 06/03/2025 at 13:05. Pushed by zamundaaa into branch 'master'. plugins/blur: clear all textures after allocating them It's not guaranteed that the driver fills them with sane values, if we don't clear them, then areas of the textures that aren't immediately painted to (like when the window starts up partially off-screen) can contain random noise and affect the final result. M +4 -0 src/plugins/blur/blur.cpp https://invent.kde.org/plasma/kwin/-/commit/b81a8635dd40380bbd4e39d4584221caca1abd8f
Git commit 9621e6b7831b207fe9fcaef58fca6f5849964790 by Xaver Hugl. Committed on 06/03/2025 at 13:41. Pushed by zamundaaa into branch 'Plasma/6.3'. plugins/blur: clear all textures after allocating them It's not guaranteed that the driver fills them with sane values, if we don't clear them, then areas of the textures that aren't immediately painted to (like when the window starts up partially off-screen) can contain random noise and affect the final result. (cherry picked from commit b81a8635dd40380bbd4e39d4584221caca1abd8f) Co-authored-by: Xaver Hugl <xaver.hugl@gmail.com> M +4 -0 src/plugins/blur/blur.cpp https://invent.kde.org/plasma/kwin/-/commit/9621e6b7831b207fe9fcaef58fca6f5849964790
(In reply to Zamundaaa from comment #8) > I managed to replicate the issue on my Intel laptop, but not on AMD, so I > suspect this may be a driver bug around 16 bit buffers. I'll do some more > debugging to find out if another buffer format works better. > > Is there anyone that has the problem on not-Intel? Hi, I can confirm graphical artifacts when using amdgpu drivers (RX 7800 XT 16GB) after wake from suspend-to-ram. They mainly occur in games (even in their menus) and/or benchmarks, strange white stripes. After they appear in games, they appear in GPU accelerated in-firefox-opened websites. Disabling color accuracy seems to disable this behaviour. I use KDE NEON latest version, resolution of monitor is 3440x1440.