Had the same problem on a fresh karmic 64 bit.
.xsession-errors gave: /etc/gdm/Xsession: Beginning session setup... mkdtemp: private socket dir: Permission denied
solved it by changing the permissions for /tmp
Had the same problem on a fresh karmic 64 bit.
.xsession-errors gave:
/etc/gdm/Xsession: Beginning session setup...
mkdtemp: private socket dir: Permission denied
solved it by changing the permissions for /tmp