Thanks for that solution, I would like to report that it worked for me also. I had reported this bug at: https://launchpad.net/bugs/54495
I also entered my BIOS setup and set Advanced -> CPU Configuration -> Execute Disable Function = Enabled My setup is: mobo: ASUS P5P800-VM integrated graphics: Intel 865G driver: i810 OS: kubuntu (dapper drake) -- kernel panic when X server terminates https://launchpad.net/bugs/34697 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs