Using Lenovo X220 laptop. I installed 12.04 on it.
Every time I boot the display's brightness sets to the highest setting: maximum_brightness 15. This is way too bright and want to set it to 4.
I have spent a long time trying to fix this. Tried editing rc.local file by adding the "echo 0 >" line before exit 0. But it never works. laptop always resets to level 15 after boot. I tried everything here: Desktop doesn't remember brightness settings after a reboot
Why isn't rc.local working for me?
Does anyone know how I can edit the maximum_brightness down? Can I set a lower maximum_brightness?