You have to use NVIDIA's configuration tool, as the driver does not support xrandr 1.2. So neither xrandr nor gnome-display-properties can be used for setting this up.
Try seeing if that tool does it; if so this bug report should be duped to the general "-nvidia lacks xrandr 1.2 support" bug. ** Changed in: nvidia-graphics-drivers (Ubuntu Natty) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/752634 Title: [Lenovo T410] Displayport cannot output to a monitor _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp