Serious Problem of Logging off

[adg]

HI,

I have R61 Thinkpad laptop and running Ubuntu Hardy.

My system is working fine but my system 'logs off' automatically while working sometimes. I am finding very difficult to deal with this problem.
Does anybody have any idea about this problem? As I am new user, you can tell the names and path of log files and I will paste the contents here.

Thanks,

[adg]

Okay, I have got following syslog at the time of logging off,


May 3 11:11:44 R61neptun kernel: [ 780.403224] compiz.real[6131]: segfault at 000049dd eip 08055a80 esp bffd9f70 error 4

May 3 11:11:44 R61neptun gdm[5726]: WARNING: gdm_slave_xioerror_handler: Fatal X error - Restarting :0

Any pointers on these things??

Thanks,