Login screen won’t accept my password
User switching wasn't working on my 12.04 LTS desktop (just dropped me to TTY8 with a blinking cursor) so I tried to manually start a second X session by logging in to TTY6 and running
startx -- :1. This didn't work either, and my machine locked up.
Now when I try to log in as the second user from LightDM, X instantly crashes and I'm thrown back to the login screen. Other accounts on the machine work fine, and it happens for every desktop environment.
I've had a poke around in my home directory, but I can't see anything obvious to change/delete to get it working again. Can anyone advise please?