Bug 509165 - Graphical glitches on desktop, blinking white dots and lines on screen border
Summary: Graphical glitches on desktop, blinking white dots and lines on screen border
Status: REPORTED
Alias: None
Product: plasmashell
Classification: Plasma
Component: general (other bugs)
Version First Reported In: 6.4.4
Platform: openSUSE Linux
: NOR minor
Target Milestone: 1.0
Assignee: Plasma Bugs List
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2025-09-05 16:13 UTC by Natasha Nox
Modified: 2025-09-05 16:13 UTC (History)
1 user (show)

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

Attachments
Lower end of the screen with the bugs in question (918.59 KB, video/mp4)
2025-09-05 16:13 UTC, Natasha Nox 		Details
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Description Natasha Nox 2025-09-05 16:13:38 UTC 
Created attachment 184751 [details]
Lower end of the screen with the bugs in question

SUMMARY
On an AMD HX370-based system there are randomly appearing white lines on the border of the screen. See attachment. Couldn't reproduce on other system, might be related to the AMD Strix Point platform specifically. Can be temporarily removed by changing the fractional scaling factor arbitrarily. Appears to be *under* the cursor.

STEPS TO REPRODUCE
1. Use the computer
2. wait until it happens

OBSERVED RESULT
White blinky dots and lines while using the desktop. Mouse can be moved over them. Fullscreen applications move over it, desktop windows do NOT (still visible).

EXPECTED RESULT
No blinking dots.

SOFTWARE/OS VERSIONS
Linux: OpenSuse Tumbleweed 20250829
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17.0 
Qt Version: 6.9.2

ADDITIONAL INFORMATION
Might be related to https://bugs.kde.org/show_bug.cgi?id=373232. With earlier Kernel & KDE combinations the very issues shown in that issue resurfaced. The white lines within terminals & such now appear very rarely. The lines in the screen border however happen all the time.

Further system info:

Graphics:
  Device-1: Advanced Micro Devices [AMD/ATI] Strix [Radeon 880M / 890M]
    driver: amdgpu v: kernel
  Display: wayland server: X.org v: 1.21.1.15 with: Xwayland v: 24.1.8
    compositor: kwin_wayland driver: gpu: amdgpu resolution: 3200x2000~120Hz
  API: EGL v: 1.5 drivers: kms_swrast,radeonsi,swrast
    platforms: gbm,wayland,x11,surfaceless,device
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa v: 25.1.7 renderer: AMD
    Radeon Graphics (radeonsi gfx1150 LLVM 20.1.8 DRM 3.64
    6.17.0-rc4-1.ge245414-default)
  API: Vulkan v: 1.4.321 drivers: N/A surfaces: N/A
  Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
    de: kscreen-console,kscreen-doctor wl: wayland-info
    x11: xdpyinfo, xprop, xrandr