I have a Macbook Pro connected to a Dell display via a Mini-Displayport to display port cable. I was previously able to control the brightness of the laptop display from my old keyboard from a Mac G4. One day, possibly when I installed a minor System update, I could no longer control the brightness. I was increasing the brightness by pressing F15 and decreasing the brightness by pressing F14. I bought a new Apple wired keyboard with dedicated brightness control buttons on F1 and F2, but I assume these only work with the Apple Cinema Displays. I also tried the old F14 and F15 keys, but those did not work either. In additon, I cannot find any way to add these commands in the keyboard shortcut menu. Does anyone know if this is still possible with the most updated version of OS X (10.6.7)?