Created attachment 142687 [details] Visual artifact on window shadow SUMMARY Hi, I'm using KDE Neon User Edition with X11 on my AMD laptop. I'm having green pixel artifacts on dark stuff since upgrading from 5.23.0 to 5.23.1. They usually flicker and don't appear on screenshots. I had to downgrade back to 5.23.0 and now they're gone, I couldn't check if Wayland sessions are effected too. Changing themes, disabling compositor or changing backend and other options didn't help, all kinds of visual stuff seems to be affected including window shades, virt-manager client screens, mpv videos etc. STEPS TO REPRODUCE 1. Install Plasma 5.23.0. 2. Open some greyish stuff, it can be images, IDE's Chromium address bar. 3. You should see green, flickering single-pixel artifacts. OBSERVED RESULT Green, single pixel artifacts on greyish visual areas. EXPECTED RESULT No artifacts. SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Neon User Edition 5.23.1 KDE Plasma Version: 5.23.1 KDE Frameworks Version: 5.87.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION CPU: AMD Ryzen 7 PRO 4750U Kernels Tried: 5.14.13-38-generic 5.14.9-38-generic 5.11.0-38-generic Graphics: Device-1: AMD Renoir driver: amdgpu v: kernel Display: x11 server: X.Org 1.20.11 driver: amdgpu,ati unloaded: fbdev,modesetting,vesa resolution: 1920x1080~60Hz, 1920x1080~60Hz OpenGL: renderer: AMD RENOIR (DRM 3.40.0 5.11.0-38-generic LLVM 12.0.0) v: 4.6 Mesa 21.0.3
Created attachment 142688 [details] Visual artifacts on Kate warning message
(In reply to Edrixous from comment #0) > Created attachment 142687 [details] > Visual artifact on window shadow > > SUMMARY > Hi, I'm using KDE Neon User Edition with X11 on my AMD laptop. > I'm having green pixel artifacts on dark stuff since upgrading from 5.23.0 > to 5.23.1. > They usually flicker and don't appear on screenshots. > I had to downgrade back to 5.23.0 and now they're gone, I couldn't check if > Wayland sessions are effected too. > Changing themes, disabling compositor or changing backend and other options > didn't help, all kinds of visual stuff seems to be affected including window > shades, virt-manager client screens, mpv videos etc. > > > STEPS TO REPRODUCE > 1. Install Plasma 5.23.0. > 2. Open some greyish stuff, it can be images, IDE's Chromium address bar. > 3. You should see green, flickering single-pixel artifacts. > > OBSERVED RESULT > Green, single pixel artifacts on greyish visual areas. > > EXPECTED RESULT > No artifacts. > > SOFTWARE/OS VERSIONS > Linux/KDE Plasma: KDE Neon User Edition 5.23.1 > KDE Plasma Version: 5.23.1 > KDE Frameworks Version: 5.87.0 > Qt Version: 5.15.2 > > ADDITIONAL INFORMATION > CPU: > AMD Ryzen 7 PRO 4750U > > Kernels Tried: > 5.14.13-38-generic > 5.14.9-38-generic > 5.11.0-38-generic > > Graphics: > Device-1: AMD Renoir driver: amdgpu v: kernel > Display: x11 server: X.Org 1.20.11 driver: amdgpu,ati unloaded: > fbdev,modesetting,vesa > resolution: 1920x1080~60Hz, 1920x1080~60Hz > OpenGL: renderer: AMD RENOIR (DRM 3.40.0 5.11.0-38-generic LLVM > 12.0.0) v: 4.6 Mesa 21.0.3 *1. Install 5.23.1
(In reply to Edrixous from comment #0) > Created attachment 142687 [details] > Visual artifact on window shadow > > SUMMARY > Hi, I'm using KDE Neon User Edition with X11 on my AMD laptop. > I'm having green pixel artifacts on dark stuff since upgrading from 5.23.0 > to 5.23.1. How strange.. I don't see any commits between 5.23.0 and 5.23.1 that could affect x11 rendering. > They usually flicker and don't appear on screenshots. > I had to downgrade back to 5.23.0 and now they're gone, I couldn't check if > Wayland sessions are effected too. > Changing themes, disabling compositor This one is also interesting. You disabled compositing, and the green dots were still there? > or changing backend and other options > didn't help, all kinds of visual stuff seems to be affected including window > shades, virt-manager client screens, mpv videos etc.
(In reply to Vlad Zahorodnii from comment #3) > (In reply to Edrixous from comment #0) > > Created attachment 142687 [details] > > Visual artifact on window shadow > > > > SUMMARY > > Hi, I'm using KDE Neon User Edition with X11 on my AMD laptop. > > I'm having green pixel artifacts on dark stuff since upgrading from 5.23.0 > > to 5.23.1. > > How strange.. I don't see any commits between 5.23.0 and 5.23.1 that could > affect x11 rendering. > > > They usually flicker and don't appear on screenshots. > > I had to downgrade back to 5.23.0 and now they're gone, I couldn't check if > > Wayland sessions are effected too. > > Changing themes, disabling compositor > This one is also interesting. You disabled compositing, and the green dots > were still there? > > > or changing backend and other options > > didn't help, all kinds of visual stuff seems to be affected including window > > shades, virt-manager client screens, mpv videos etc. Yes, exactly. However, I've upgraded (from downgraded 5.23.0 to 5.23.1) once again, to check if Wayland sessions are effected but now both Wayland and X11 sessions looks good. I'll keep an eye few more days.
Looks like it's fixed after downgrading back to 5.23.0 and upgrading to 5.23.1 again, don't have a clue why but it works.