This is, sadly, by design. Because of the long standing GTT-incoherency bugs (see master bug #541511), we disabled the Intel driver on i855 hardware.
** Changed in: xserver-xorg-video-intel (Ubuntu) Status: New => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/642257 Title: Compiz effects not functioning at all in Maverick beta, w/ i855 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs