Created attachment 130437 [details] Maximized window having 1px red line on the left and top edge of the window decoration SUMMARY With scaling factor 150% set, the window decoration on a maximized window is not large enough to cover all underlying pixels, leaving about 1px line on top. STEPS TO REPRODUCE 1. Set the desktop wallpaper to a solid color, like red 2. Maximize any window with server-side decoration (I tried dolphin, vscode, system settings) OBSERVED RESULT There is a 1px red line on the top of the screen. See the attached screenshot. EXPECTED RESULT The window and decoration should fully cover whatever is underneath them. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Archlinux with latest updates (kernel 5.7.10-arch1-1) (available in About System) KDE Plasma Version: 5.19.3 KDE Frameworks Version: 5.72.0 Qt Version: 5.15.0 ADDITIONAL INFORMATION This is on a *Wayland* session. I'm aware of [1], but that happens on X11, and for me the 1px line only appears in the window decoration section. So I think this is a different bug. [1]: https://bugs.kde.org/show_bug.cgi?id=391956
Created attachment 130438 [details] If the window doesn't use window decoration, there is no red pixels visible The same setting as in the report, but with the Vivaldi browser, which doesn't use window decoration. And there is no red pixels visible.
This bug was reported against an outdated version of KWin. We have made many changes since the. If the issue persists in newer versions can you reopen the bug report updating the version number.