Sunday, October 23, 2011

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 backlight
gconftool-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.

If you are reading this, thanks for introducing me to xbacklight.

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