Bug#365710: Bastian's suggestion worked for me

["Joe Greenseid" <jgreen@thunderlizards.net>]

I got caught by this not being able to log in problem as well, and
Bastian's suggestion of `sudo cp /etc/X11/Xsession.xfree86
/etc/X11/Xsession` solved my problem immediately.

Figured I'd chime in saying it worked for me.

Thanks,
--Joe