I just installed Ubuntu 11.10 x64, after making sure I could use my 2-monitor setup with the Live CD, but now Ubuntu cannot detect both my monitors. I've tried both of the Additional Drivers that Ubuntu offers, and neither helps. I've got a PNY GTS 250 1GB card with 2 DVI monitors hooked up, if that helps.
Here's a screenshot of my Display Settings screen: http://i.imgur.com/aWCFI.png
Any ideas on how to get it working like I did with the Live CD? Or why it was working from the Live CD but won't work now that I've installed?