I think that I found solution for this problem. In that site: http://fedoraproject.org/wiki/Xorg/Debugging
"Some issues may be worked around by disabling kernel mode setting. To do this, add nomodeset as a kernel parameter." I did so, and was able to change appearance preferences visual effects to normal and extra. Compiz effects working fine too. Someone with this problem, please confirm my solution. -- Xorg freeze without reason in Ubuntu 10.10 https://bugs.launchpad.net/bugs/658649 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp