I've recently upgraded from 12.10 to 13.04. I use several user accounts on my system and the problem is only with the "first" user, i.e. the one with which I can
root, all other accounts are ok.
I cannot login via the main login box. I can, however, press Ctrl+Alt+F6, login to a terminal and run
startx, which brings me up a normal session. This is an acceptable workaround, but it is probably not what the developers intended.
Anyone know of a better fix?