I have Ubuntu 11.04 installed on my Samsung NC10.
I tried changing my screen A with another one B having same size, resolution and backlight (LED). Mine works fine and the other is very dim/dark; you can barely make out the desktop. It's working but with a big issue on brightness. I tried already increasing brightness with the key-combinations, no result.
Could this be Linux related? Screen B works perfectly fine on a Windows machine; screen A works fine on my Linux machine (fine = only part of it due to a crack, reason why I'm trying to change it).