Allegedly, on or about 24 June 2018, Beartooth sent:
But now it just keeps giving me a login screen, letting me type, and (after Enter) going back to the login screen.
I remember things like that, in the past, being associated with the wrong permissions for the /tmp directory. The graphics system wanted to write a lock file, and would get upset when it couldn't.
$ ls -ldZ /tmp drwxrwxrwt. 16 root root system_u:object_r:tmp_t:s0 400 Jun 25 03:48 /tmp