yep, this is exactly the reason why i asked this question. i recall that on windows i was able to do such thing (iirc, it has been some time already :), however i wasn't able to find any docs for linux :(Most newer laptops can do it under windows. Although at almost every talk, someone finds out that accelaration doesn't work on the second display, even when the external display is simply mirroring the LCD. So someone goes to play a movie, and is stunned into silence when they discover that the movie that is playing beautifully on the LCD is not being displayed at all on the projector :) When I tell them to flick the LCD/external button a few times until the internal display is off, it works.
regards, -- Lubos _@_"