Ubuntu Ibex second monitor problem

[david-8uUts6sDVDvs2Lz0fTdYFQ at public.gmane.org (David Kramer)]

Derek Martin wrote:
> Well, you mentioned mythfontend, which may mean that this machine runs
> MythTV, in which case you probably want separate X displays for each
> monitor.  If that's *not* essential, then I think the fastest and
> easiest way to fix your problem is to go back into the NVidia tool,
> select "X Server Display Configuration" on the left, and then click
> the "Configure..." button in the layout configuration dialog.  Choose
> TwinView, make any other relevant changes, if any (I believe this will
> be fairly intuitive), and restart X.  This will make your two devices
> work like one big X display, and will still work fine if the TV is not
> connected.

I tried TwinView and Xinerama.  While I liked the feel of being able to
move apps from one screen to another, I wasn't able to figure out how to
get mythfrontend to appear only on the TV, and with the right
dimensions.  It's easy as two separate X screens, because I can tell
mythfrontend to automatically set its size to the whole screen, then
launch it from the menu on the TV.