When I log in to Gnome using Gdm, I immediately get sent back to the login screen. Logging in the second time works fine but I seem to get randomly logged out at which point I cannot log in again (I can enter password but when I press enter the password field is greyed out and nothing happens. I can still use the mouse to restart the computer).
How do I diagnose this problem?
It only happens for one user, the other is fine.
Thanks in advance