For whatever reason (this was working correctly on Ubuntu 12.04 LTS) when I try to set my displays on top of each other in the settings, it won't allow to place them on top of each other. When I click "apply" I get the error message "Could Not Set Configuration Mode for CRTC 63." Can anybody help me with this? It wont let me set the two displays on top of each other, but it will allow me to place them side to side. Also, I get a random "Unknown display" as well. This was not existent in 12.04 LTS and I have no idea what it is, seeing as how the only screens that are in use, or plugged up for that matter, is my laptop's display (1366x768) and my Samsung TV display (1360x768) thru HDMI.