I think Martin on to something concerning GRUB/Linux boot options, more specifically the "splash" one. With testing-updates enabled what currently happens for me:
If I set automatic login on I'm stuck with the standard infinite login loop, but with the distinction that I can now no longer enter another TTY via ctrl+alt+F3 for example to fix it straight away. The whole system now just freezes, so I fixed it via recovery mode. Out of curiosity I then went and disabled the following line in /etc/default/grub and ran "sudo update-grub": GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" Result: Automatic login now works perfectly, no issues anymore. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845801 Title: [nvidia] Automatic login fails and then all subsequent logins fail. Killing gnome-session-binary fixes it, or just not using automatic login. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1845801/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs