I use script from http://ubuntuforums.org/showthread.php?p=11255814.
This script works on my ASUS UL30V perfeclty, but i have problems after suspend or hibernation ... Value of backlight is on maximum. How can I do that backlight value will be same before and after suspend/hibernation. Any ideas ?
PS: I reduced power consumtion to 6.5 W and I have 10 hours of battery .