I have the same issue. I think it has to do with the Nvidia 8 series, because I have a Nvidia 8800 GTX. I tried the proprietary driver packages, didnt help. I then tried to manually install the latest driver via Nvidia's website. Again, didnt help. I have only tested it using XFCE, but I suspect the same under Unity. I really am only affected when doing anything requiring any "special effects" such as from Cairo-dock and switching workspaces. I also have compositioning enabled to allow a proper transparency on my conky.
** Package changed: xserver-xorg-video-nouveau (Ubuntu) => nvidia- graphics-drivers (Ubuntu) ** Package changed: nvidia-graphics-drivers (Ubuntu) => xorg (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/997075 Title: XOrg uses 100% CPU after upgrade to 12.04 and freezes computer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/997075/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
