So I'm a complete beginner here and probably have a really dumb question. I can't figure out how to set up my video card.

I want to run dual monitors using one on my Intel onboard video, and the other on my Radeon 9250 card. This setup has always worked fine in windows. If I can't run dual, I would at least like to switch to the Radeon rather than the onboard.

When I use the command 'lspci | grep VGA', it displays both my onboard and Radeon cards like so:

00:02.0 VGA compatible controller: Intel Corporation 82845g/GL Chipset integrated graphics device
01:06.0 VGA compatible controller: ATI Technologies Inc RV280 [Radeon 9200 Pro] (rev 01)

So now where do I go to select the monitor? When I go to System -> Monitors the only monitor to show up is my onboard card. How do I select the Radeon, or set it up as the second display?