I am going to close this bug after talking to Pete Graner as it seems to be a combination of two other bugs (bug #749817 and a bug in gnome- display-properties where it gets confused when trying to use the configuration I am). The choice of resolutions shows up correctly in gnome-display-properties and xrandr on its own works these days.
Workaround gnome-display-properties not working right: Create ~/bin/external-monitor: #!/bin/sh xrandr --output LVDS1 --off --output VGA1 --mode 1680x1050 nohup unity & Then run that in Alt+F2. ** Changed in: linux (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/711954 Title: Cannot use external monitor at its native resolution -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs