CentOS - Feb 2010 - gdm_slave_xioerror_handler: Fatal X error - Restarting :0

Hi,guys:

I've been having gnome restart when I've been using firefox. Looking
around
in diffierent logs i found..

Feb 22 22:02:19 localhost last message repeated 9 times
Feb 22 22:02:19 localhost scim-bridge: The lockfile is destroied
Feb 22 22:02:19 localhost scim-bridge: Cleanup, done. Exitting...
Feb 22 22:02:19 localhost gdm[5192]: gdm_slave_xioerror_handler: Fatal X
error - Restarting :0
Feb 22 22:02:22 localhost kernel: mtrr: 0x98000000,0x8000000 overlaps
existing 0x98000000,0x2000000
Feb 22 22:02:22 localhost last message repeated 2 times
Feb 22 22:02:22 localhost kernel: agpgart: Found an AGP 2.0 compliant device
at 0000:00:00.0.



Could someone meet this problem ?

 I googled around and saw some other people were having a similar issue but
with laptops ....
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