Ubuntu 12.04 "Do nothing" when "lid closed" blanks out external monitor
Here is the way this works. When it is set to do nothing and you close the lid it blacks out the laptop display and the external monitor. Then all you have to do is move the mouse and the secondary external monitor will come on. I never tried that before but it works! So, I kind of like it like this because if I leave the room and don't want to go full stand by (I used to turn the monitor off physically (w/button)) now I can just close the lid, then if I want to use the secondary monitor I just move the mouse and the main laptop lid is still off keeping the laptop a bit cooler.