Comment 5 for bug 450901

Camilla, a minimal example that triggers the problems is usually incredibly useful for the upstream developers, so we would appreciate that. If it involves a non-trivial amount of time investment you may want to try with xorg-edgers (https://launchpad.net/~xorg-edgers/+archive/ppa) enabled first, which has the bleeding edge drivers and mesa. You may also try a recent mainline kernel build from http://kernel.ubuntu.com/~kernel-ppa/mainline/ (see info at https://wiki.ubuntu.com/KernelTeam/MainlineBuilds) in case improvement to direct rendering has solved this.