Jeff, external monitors with nVidia proprietary drivers need to be configured through the nVidia application, as xrand does not work with the proprietary drivers (this is a classic issue). Did you try using nVidia's application?
** Changed in: linux (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/775831 Title: [Latitude E6510] Ext VGA and DisplayPort do not work -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs