I saw your post and I was looking for the same answer and found it!
just add these lines to your Xorg ;) .. Just looked at the date for
your post ... if you still don't have it here it is if you already have
it .. sorry to bug you
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "MouseSystems"
Option "Device" "/dev/cuau3"
EndSection