https://bugs.kde.org/show_bug.cgi?id=508089
Bug ID: 508089
Summary: Persistent square artifact on wallpaper in Plasma
6.4.4 with AMD Radeon 860M (AMDGPU driver) on Arch
Linux
Classification: Plasma
Product: plasmashell
Version First 6.4.4
Reported In:
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Wallpaper images
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: 1.0
Created attachment 183935
--> https://bugs.kde.org/attachment.cgi?id=183935&action=edit
Black Square in any wallpaper
Product: Plasma Workspace
Component: KWin / Compositor / Wallpaper Rendering
Version: 6.4.4
Severity: Normal (visual artifact)
Operating System: Arch Linux x86_64
GPU: AMD Radeon 860M (integrated in AMD Ryzen 7 PRO 3500U)
Kernel: 6.15.9-arch1-1
Mesa: 25.1.7
X Server Driver: xf86-video-amdgpu 23.0.0
Session Type: Both X11 and Wayland (issue occurs on both)
Description:
I experience a persistent, small square artifact overlay visible on the desktop
wallpaper regardless of the wallpaper image or scaling method used. This issue
appears immediately after login and remains through Plasma shell restarts. It
affects all wallpapers and does not disappear when toggling the compositor,
switching compositor backends (OpenGL 3.1, OpenGL 2.0, XRender), or changing
session types (X11 vs Wayland).
Steps to reproduce:
Log in to Plasma 6.4.4 session (X11 or Wayland) on Arch Linux with AMD
Radeon 860M GPU.
Observe the desktop wallpaper.
The small square artifact appears on the wallpaper and remains persistent.
What I’ve tried:
Restarting Plasma shell (kquitapp5 plasmashell && kstart5 plasmashell)
Clearing Plasma caches (rm -rf ~/.cache/plasma*)
Switching compositor backend between OpenGL 3.1, OpenGL 2.0, and XRender
Toggling compositor on/off (Alt + Shift + F12)
Changing wallpaper scaling mode and wallpaper plugin (Image, Slideshow)
Testing on both X11 and Wayland sessions
Confirmed AMDGPU kernel driver loaded and up-to-date Mesa stack
Updating xf86-video-amdgpu, Mesa, and Linux firmware packages
Expected behavior:
No square or artifact overlay should appear on the desktop wallpaper regardless
of wallpaper image or compositor settings.
Actual behavior:
A visible square artifact appears on the wallpaper immediately after login and
persists through compositor toggling and Plasma shell restarts.
Additional info:
Kernel: 6.15.9-arch1-1
Plasma: 6.4.4
GPU driver: AMDGPU open source, Mesa 25.1.7
Hardware: ThinkPad P16s Gen 4, AMD Ryzen 7 PRO 3500U, Radeon 860M
Arch Linux x86_64 up to date
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