I have Mathematica 8 installed on my Ubuntu laptop since 2011. I updated Ubuntu several times, and experienced no problems with Mathematica. It also worked smoothly after I updated Ubuntu to 13.10 (it worked for sure for a week after update).

When I tried to start Mathematica today by executing a .sh-file, the screen went black, I was logged out from the session and thrown back to the login screen.

Typing mathematica in the terminal produced the same effect.

Typing mathematica -cleanstart or mathematica -mesa did not help.

Starting Gnome session with or without effects did not help

Launching mathematica under another user account did not help.

I still can run text-only version of mathematica by typing math in the terminal.

I don't remember making any changes to my configuration except for installing updates.

Is there any quick way to fix this behavior? How can I know which component exactly crashed? Where should I look for crash logs?