Created attachment 133320 [details] The bad splash screen on wayland SUMMARY STEPS TO REPRODUCE 1. Launch eclipse once with plasma + x11 and once with plasma-wayland 2. Observe the difference between splash screens OBSERVED RESULT With X11 the eclipse splash screen work like expected. With wayland it appears as a framed window not centered in the screen EXPECTED RESULT No difference between X11 launch and wayland launch. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
See those bug on the eclipse bug report tool that seem to be related to this bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=549504 https://bugs.eclipse.org/bugs/show_bug.cgi?id=473278 https://bugs.eclipse.org/bugs/show_bug.cgi?id=564394
Splash screens of kdenlive, audacity and qBittorrent are also not centered on the screen on Wayland session of Arch Linux (Plasma 5.20.3) and neon unstable.
Possibly related bugs: https://bugs.kde.org/show_bug.cgi?id=427452 https://bugs.kde.org/show_bug.cgi?id=421002 https://bugs.kde.org/show_bug.cgi?id=369435 https://bugs.kde.org/show_bug.cgi?id=374669 https://bugs.kde.org/show_bug.cgi?id=385153 https://bugs.kde.org/show_bug.cgi?id=390220 https://bugs.kde.org/show_bug.cgi?id=409015 https://bugs.kde.org/show_bug.cgi?id=360070 https://bugs.kde.org/show_bug.cgi?id=428806
See also this bug on wayland bug report tool: https://gitlab.freedesktop.org/wayland/wayland/-/issues/40
This is somewhat to be expected. Wayland windows can't position themselves. For the Qt clients listed, we can maybe implement layer-shell when we detect the window type is a splash screen. For eclipse, it needs eclipse to do something.
See also this discussion https://gitlab.gnome.org/GNOME/mutter/-/issues/316