I am getting the same error:
May 28 13:24:55 aud22419-linux gdm[8343]: WARNING: gdm_slave_xioerror_handler: Fatal X error - Restarting :0
thiago@aud22419-linux:~$ uname -a Linux aud22419-linux 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009 x86_64 GNU/Linux
I am getting the same error:
May 28 13:24:55 aud22419-linux gdm[8343]: WARNING: gdm_slave_ xioerror_ handler: Fatal X error - Restarting :0
thiago@ aud22419- linux:~ $ uname -a
Linux aud22419-linux 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:58:03 UTC 2009 x86_64 GNU/Linux