You sir have just solved the problem and won yourself a beer :)Naoki wrote :When I try : System-->Prefs-->More Prefs-->Desktop Effects It seems to remove all window management, I get all the applications from my eight workspaces on the one screen, I can no longer switch between workspaces (which has been reported before so I understand this issue) and the applications no longer have borders and are unable to be manipulated.I saw this on a computer where I had dri disabled in xorg.conf. Re-enabling it and restarting X made the switch to compiz work. Matthias