I have a "Macbook2,1" with an Intel 945GM just like the original poster and have been experiencing precisely the same symptoms (all the way down to the behavior of each of the BACKLIGHT_CONTROL methods) as described in this bug since I started using Jaunty sometime in the alphas. I have just been using the "combination" method to get a usable backlight through the following command:
I have a "Macbook2,1" with an Intel 945GM just like the original poster and have been experiencing precisely the same symptoms (all the way down to the behavior of each of the BACKLIGHT_CONTROL methods) as described in this bug since I started using Jaunty sometime in the alphas. I have just been using the "combination" method to get a usable backlight through the following command:
xrandr --output LVDS --set BACKLIGHT_CONTROL combination