Compiz and Xinerama are not compatible.
Try Unity 2D if you want to use the Unity UI with Xinerama, else use Gnome without Compiz with Xinerama:
http://packages.ubuntu.com/natty/unity-2d
Compiz and Xinerama are not compatible.
Try Unity 2D if you want to use the Unity UI with Xinerama, else use Gnome without Compiz with Xinerama:
http:// packages. ubuntu. com/natty/ unity-2d