I would like to run two independant Xservers on one machine, preferable using the TV-out.

Ie. I would like for linux to play a movie on the TV using TV-out, and still be able to work with a document og graphics on the monitor.

I have read the guide on howto start a second Xserver on the TV-out, but it says that the monitor blanks out, when you change to the TV-out Xserver. So this does not work for me, I need them both to be active at the same time.

I have also studied the Twinview option on Nvidia cards, but it seams that both monitors are showing the same screen, which won't work for me either.

Can this be done, or do I need two graphics cards for this to work ?
Can anyone point me to a howto document ?