gdm is an invisible daemon you don't observe directly and the syslog in comment #4 shows it is working fine. What isn't working there is gnome- shell:
Sep 25 09:59:09 michel-slim-ekimia kernel: [ 156.762025] traps: gnome-shell[23369] trap int3 ip:7fcbcbecf295 sp:7fff2dcfedd0 error:0 in libglib-2.0.so.0.6400.6[7fcbcbe93000+84000] Sep 25 09:59:09 michel-slim-ekimia gnome-shell[23369]: Settings schema 'org.gnome.mutter.x11' is not installed Sep 25 09:59:09 michel-slim-ekimia systemd[14684]: gnome-shell-x11.service: Main process exited, code=dumped, status=5/TRAP Sep 25 09:59:09 michel-slim-ekimia systemd[14684]: gnome-shell-x11.service: Failed with result 'core-dump'. ** Package changed: gdm3 (Ubuntu) => gnome-shell (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/1945047 Title: Gdm does not start anymore on 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1945047/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
