I think the duplicate status is wrong. I see this behaviour with a DisplayPort monitor (and no other screens connected) on standard Ubuntu Desktop 14.04 - I am not running Mythbuntu and I don't have xfce4-settings installed. See my post above.
I think the duplicate status is wrong. I see this behaviour with a DisplayPort monitor (and no other screens connected) on standard Ubuntu Desktop 14.04 - I am not running Mythbuntu and I don't have xfce4-settings installed. See my post above.