I always set the default SDDM background to solid gray color to avoid hurting my eyes when I boot my laptop in a room with low brightness. So my file "/usr/share/sddm/themes/breeze/theme.conf.user" contains this: [General] background= color=#1c1e21 But if I enabled autologin in Plasma Settings/SDDM/Behavior page, then click on that Apply button, it adds another line to the file above and becomes: [General] background= color=#1c1e21 type=image This will force that default cartoonish wallpaper. Operating System: Manjaro Linux KDE Plasma Version: 6.0.4 KDE Frameworks Version: 6.1.0 Qt Version: 6.7.0 Kernel Version: 6.8.9-1-MANJARO (64-bit) Graphics Platform: Wayland
Huh, I didn't know SDDM supported solid colors like that.