Sir/Madam There is some problem with my X window session. When i login through my ID over there then this message pops up. Your session only lasted for 10 sec.If you have not logged out yourself this could mean that there is some installation problem or that you may be out of diskspace.Try logging in with one of the fail safe sessions to see if you can fix this problem View Details(~/.xsessions-errors file) I have checked user's disk usage and also the quota of user but every thing is fine. Please tell what could be problem Waiting for your replay soon. Thank you Ritesh Thawani (Student)