Created attachment 156344 [details] square artifacts SUMMARY Square artifacts follow cursor. Seems inconsistent, sometimes it appears on the panels of none, one, or both of my monitors. Also appears on some other applications like dolphin emulator and mpv. I think it's a new issue on 5.27. STEPS TO REPRODUCE 1. hover over panel with cursor OBSERVED RESULT squares appear EXPECTED RESULT no squares SOFTWARE/OS VERSIONS Linux/KDE Plasma: Arch Linux (available in About System) KDE Plasma Version: 5.27.0 KDE Frameworks Version: 5.103.0 Qt Version: 5.15.8 ADDITIONAL INFORMATION GPU: AMD 7900XTX (mesa-git 23.1)
Forgot to mention this is on wayland
*** This bug has been marked as a duplicate of bug 465158 ***
This was not fixed by https://bugs.kde.org/show_bug.cgi?id=465158 so I am reopening this bug. Upgraded to 5.27.7 and these square artifacts are still appearing with blur desktop effect enabled. The artifact has the color of the desktop wallpaper behind it. Linux: Arch Linux KDE Plasma Version: 5.27.7 (wayland) KDE Frameworks Version: 5.108.0 Qt Version: 5.15.10 GPU: AMD 7900XTX (mesa-git 23.3) Display scaling: 150%
Interestingly, it looks like this one isn't specifically about blur (which got fixed recently). This happens with blur disabled too, if you kill plasmashell. Steps to reproduce: - Set scale to 150% (or anything non integer) - Open some apps (e.g. konsole, systemsettings) - killall plasmashell - (optional) `swaybg -o '*' -i /usr/share/backgrounds/default.png` (or whatever image) to put up a background (makes the problem more obvious) - Move the mouse and windows around (force software cursors to make it more obvious if your driver supports hardware cursors) You'll see black single pixel trails around the cursor and window edges on the swaybg wallpaper and some window contents, but not all. E.g. the glitches seem to appear on most of the Konsole window, but on System Settings only the window decorations are affected. This happens with the blur effect completely disabled. AIUI the blur glitch was about the blurring itself being computed wrong. This one looks like a different problem, related to dirty rectangle/redraw tracking. KDE Plasma Version: 5.27.7 (wayland)
Adding Vlad to Cc since he might know more about what's going on, given his involvement with Bug 465158 and Bug 455526