Originally Posted by piojo2
To change the brightness, you can run nvidia-settings to use a GUI. Or on the command line, type "nvidia-settings -a brightness=n" where n is between -1 and 1 (0 being 100%).
Only problem is that doesn't actually change the backlight intensity, it changes the color curve; the backlight is still going full blast but the LCD is trying to fight it. Not too good if you're trying to extend your battery life for instance!