Be aware that xorg-edgers ppa is very volatile so be prepared for things to break. For example, I currently can not use nvidia driver due to bug https://bugs.launchpad.net/ubuntu/+s...rs/+bug/973096 so am using nouveau. However, currently nouveau driver locks up my system after a couple of hours if I use the 3.5 kernel installed by xorg-edgers, I have to pin back to the generic 3.2 kernel. These kind of bugs have happened to me on previous ubuntu releases where I have used xorg-edgers ppa.
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