How to connect a projector to my Ubuntu laptop?
I didn't use booting. just go to System Setting > Display. Set on another display and 800x600 resolution and then press apply. no problem at all on Ubuntu 14.04.
Since the first time I use GNU/Linux. I always use arandr when it comes to managing external screen.
arndr in action:
You can drag the external active screen atop your current screen, save the configuration, reload it in other session, or even change the screen resolution. Pretty nice.