Samsung P580 backlight brightness on Ubuntu 12.04

After everything else works out of the box with a fresh install of Ubuntu 12.04 I realized that brightness control via FN key doesn’t. The problem seems to be somewhere located in the Nvidia driver for GT330M and can easily be solved by adding one line to the “Device” section of /etc/X11/xorg.conf.

Hit ALT-F2

gksu gedit /etc/X11/xorg.conf

add

Option "RegistryDwords" "EnableBrightnessControl=1"

to the “Device” section so it looks somewhat like this

Section "Device"
Identifier "Default Device"
Option "NoLogo" "True"
Option "RegistryDwords" "EnableBrightnessControl=1"
EndSection

save file and finally reboot or restart lightdm with

sudo service lightdm restart

and brightness control is back in your hands!

One Response to “Samsung P580 backlight brightness on Ubuntu 12.04”

  1. Adrien says:

    Hi ! Didn’t work for me…… Any other solution ?

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