The xrandr output is taken from the TV itself, so if it is reporting that it can do 1280x1024, X will try to use that resolution. The way to solve this is to teach the kernel to not provide that resolution for this particular piece of hardware using a 'quirk'. Unfortunately since no X or kernel logs are included it's not possible to construct this.
Are you still able to reproduce this behavior on Ubuntu Precise? If you don't want to install Ubuntu Precise, it should be sufficient to boot a Live USB session, configure the monitors, and see if it is working properly now. You can get the current Live USB desktop image at http://cdimage.ubuntu.com/daily-live/current/ and create a USB boot drive using usb-creator. If it still occurs, please attach your /var/log/Xorg.0.log, the output of 'xrandr --verbose', and the output of 'sudo dmesg > dmesg.txt'. ** Changed in: xorg-server (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/566862 Title: can't detect external LCD display and gnome-display-properties window lies in external monitor To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/566862/+subscriptions _______________________________________________ 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
