I've spent 3 days to solve this problem. And finally I found this link. Changing disable_xdamage value works fine. thanks. I think this option would be default value.or many people have to spend their time searching for the solution.
-- Compiz / vnc screen refresh with nvidia-restricted driver/VirtualBox/ATI fglrx driver using X.org https://bugs.launchpad.net/bugs/353126 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server 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