From the Readme, it says certain things that work only with one
display will not work in TwinView.
I assume that includes Overlays, XV, and some other things...
I'm attempting to get TV-Out working just on the TV (maybe a separate X server for the VGA) to avoid this problem --
so far MythTV & Ogle are ok, but I'm trying to get fullscreen to be
10% overscanned or so...