This might be somehow related to bug 1841873. To check that, please log in via ssh and force a crash dump while it is unresponsive:
sudo killall -ABRT gnome-shell Then please report that in a new bug using: ubuntu-bug /var/crash/YOURFILE and tell us the new bug ID. ** Changed in: gdm3 (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1841915 Title: black screen, unresponsive, after logout from gnome To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1841915/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs