Hello there, I had the same issue (completely white background), which I could reproduce with:
$ sddm-greeter-qt6 --test-mode --theme /usr/share/sddm/themes/debian-breeze I was consistently getting the following error: file:///usr/share/sddm/themes/breeze/Background.qml:21:5: QML QQuickImage: Cannot open: file:///usr/share/sddm/themes/breeze/background.svg And indeed, there's no such file on my computer. Then I found that there was a superfluous file (not-managed by dpkg) in the theme directory: $ cat /usr/share/sddm/themes/debian-breeze/theme.conf.user [General] background=background.svg type=image Removing this file solved the sddm-greeter test-mode at least (I'll report back only if it did _not_ solve the issue post re-login). This looks like a file created by systemsettings in the wrong folder (it should _really_ be written somewhere in /etc); and I'd suggest it should be removed on upgrade, to restore the sddm-theme-debian-breeze behaviour. Best, OdyX Le samedi, 14 décembre 2024, 17.28:48 h CET Huey Chen a écrit : > Since upgrading KDE Plasma from 5 to 6, the SDDM login screen is simply > white and hard to see any icons. This only happens when using the Debian > Breeze theme since it only support KDE Plasma 5.
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