With Lion, is it possible to use an external display with a MacBook, leaving the clamshell open, and having nothing on the MacBook's display? It's possible to do this in Snow Leopard by waking up my MacBook with the clamshell closed (with an external display connected) and then opening the clamshell. However, in Lion, opening the clamshell when the MacBook is awake activates the MacBook's display. Is there another way to turn off the MacBook's display? I'd like to know because I need to leave the clamshell open in order to get reliable Wi-Fi reception in my room, and I don't want to waste VRAM on the MacBook's display. Edit: This question has been resolved. Thanks phyrexia. I'll try it out later.