Comment 4 for bug 25739

This problem seems to be occuring more often lately, so I started looking
through my log files to see if there was anything else I could find. I noticed
this in /var/log/syslog...

Dec 23 09:07:11 krypto kdm kdm[6738]: X server for display :0 terminated
unexpectedly
Dec 23 09:07:12 krypto kdm: :0[7145]: IO Error in XOpenDisplay
Dec 23 09:07:11 krypto kdm[6738]: X server for display :0 terminated unexpectedly
Dec 23 09:07:11 krypto kdm[6738]: Display :0 cannot be opened
Dec 23 09:07:11 krypto kdm[6738]: Unable to fire up local display :0; disabling.

So I looked in /var/log/kdm.log, and I noticed the following error message...

Error in I810WaitLpRing(), now is 59674966, start is 59672965
pgetbl_ctl: 0x19890001 pgetbl_err: 0x10f0d000
ipeir: 0 iphdr: 50c00004
LP ring tail: 2d50 head: 2b08 len: f001 start 3c0000
eir: 0 esr: 0 emr: 3d
instdone: ff3a instpm: 0
memmode: 4 instps: 810
hwstam: 9ac7 ier: 0 imr: 9ac7 iir: 0
space: 64944 wanted 65528

Fatal server error:
lockup

Please consult the The X.Org Foundation support
  at http://wiki.X.Org
 for help.
Please also check the log file at "/var/log/Xorg.0.log" for additional information.

And here is the error message from /var/log/Xorg.0.old...

pgetbl_ctl: 0x1c780001 pgetbl_err: 0x0
ipeir: 0 iphdr: 50c00004
LP ring tail: 9be0 head: 9780 len: f001 start 3c0000
eir: 0 esr: 0 emr: 3d
instdone: ff3a instpm: 0
memmode: 4 instps: 810
hwstam: 9ac7 ier: 0 imr: 9ac7 iir: 0

Fatal server error:
Active ring not flushed

Please consult the The X.Org Foundation support
  at http://wiki.X.Org
 for help.
Please also check the log file at "/var/log/Xorg.0.log" for additional information.

Hopefully this helps a little, if there's something else I can provide please
don't hesitate to ask.

Thanks.