I have a similar issue on Ubuntu 20.04 with 1.30.0-0ubuntu4~20.04.1. Sometimes I enter my password, the screen goes black and I have to log in another time. Once lightdm didn't start at all.
If such issues occur I have these entries in the journal: Sep 12 20:03:10 marco-MS-5455 lightdm[1123]: pam_unix(lightdm:auth): Couldn't open /etc/securetty: No such file or directory Sep 12 20:03:12 marco-MS-5455 lightdm[1055]: pam_unix(lightdm-greeter:session): session closed for user lightdm Sep 12 20:03:12 marco-MS-5455 systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE Sep 12 20:03:12 marco-MS-5455 systemd[1]: lightdm.service: Failed with result 'exit-code'. Sep 12 20:03:13 marco-MS-5455 systemd[1]: lightdm.service: Scheduled restart job, restart counter is at 1. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1943285 Title: login screen lagging. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1943285/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
