Comment 11 for bug 136529

I have the same problem. it's not /tmp for me either, that looks fine. On login, the gdm window goes away, then the X server appears to crash or exit, then comes back to the login window. I tried switching to kdm, behaves the same way.

One oddity that might be related is that it's running on the 8th virtual terminal, not the 7th as normal.