More GCONF Fun - Setting display backlight

In my Clevo notebook all the Fn keys work, except the Brightness keys. So,\ after search quite long, I have found that the only solution that really works for me\ is "xbacklight".\ So, here is how to map the "Special Key " and alt together with F8 and F9 to reduce or\ increase screen brightness.\ First, install xbacklight: \

aptitude install xbacklight

Decide where you want the custom script to reside (see bellow) and export the following bash variable: \


Then create custom keybindings:

#setting to decrease
gconftool-2 -s /desktop/gnome/keybindings/custom1/action -t string "xbacklight -dec 14"
gconftool-2 -s /desktop/gnome/keybindings/custom1/binding -t string "F8"
gconftool-2 -s /desktop/gnome/keybindings/custom1/name -t string "Reduce Backlight"
#setting to increase backlightg
conftool-2 -s /desktop/gnome/keybindings/custom2/action -t string "$PATHWHEREYOUWANTYOURSCRIPT"
gconftool-2 -s /desktop/gnome/keybindings/custom2/binding -t string "F9"
gconftool-2 -s /desktop/gnome/keybindings/custom2/name -t string "Increase Backlight"

And finally, setup the the script which increases the screen brightness:

#note: if you chose like me /usr/local/bin/
#run the following as root.
#you can also have it in ~/bin/, just make
#sure ~/bin/ is in your PATH


# a simple script to avoid the fact 
# that it is impossile to increase 0 precent
# by add more precent ...

LEVEL=`xbacklight -get`

if [ $LEVEL == "0.000000" ]; then
    xbacklight -set 15
    xbacklight -inc 15


That is all.\ \ P.S.\ Yariv,\ If you are reading this, thanks for introducing me to xbacklight.

This entry was tagged: debian, foss, linux

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