sddm does not start up at all but no error is reported anywhere - see systemctl checks log attached.
A rather clearer report is given running the command from the console: root@nuc-peter:/var/log# /usr/bin/X -nolisten tcp -auth /var/run/sddm/{03a073a1-922f-4e49-b7c0-e86bf64358a5} -background none -noreset -displayfd 17 vt7 bash: /usr/bin/X: No such file or directory And just to be certain: root@nuc-peter:/var/log# ls -l /usr/bin/X ls: cannot access '/usr/bin/X': No such file or directory sddm itself is installed: root@nuc-peter:/var/log# which sddm /usr/bin/sddm ** Attachment added: "systemctl checks" https://bugs.launchpad.net/ubuntu/+source/sddm/+bug/1563048/+attachment/4662457/+files/log.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1563048 Title: Kubuntu login screen not displayed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sddm/+bug/1563048/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs