Adjust the screen brightness modifying directly the gnome settings daemon power

brightnessControl

#!/bin/bash

# Adjust the screen brightness modifying directly the gnome settings daemon power.
# To use this script you just have to save it in a path with execution permissions and assign the commands "brightnessControl up" and "brightnessControl down" to the keys using shortcuts.

# There's a better way to do this: install xdotool and assign the commands “xdotool key XF86MonBrightnessUp” and “xdotool key XF86MonBrightnessDown” to the brightness keys.
# With this solution the brightness indicator will come out on screen when we change the brightness.

# Arguments
way="$1" # Up or Down

if [ $1 == "up" ]
then
	$(dbus-send --session --print-reply --dest=org.gnome.SettingsDaemon /org/gnome/SettingsDaemon/Power org.gnome.SettingsDaemon.Power.Screen.StepUp >> /dev/null)
else
	if [ $1  == "down" ] 
	then
		$(dbus-send --session --print-reply --dest=org.gnome.SettingsDaemon /org/gnome/SettingsDaemon/Power org.gnome.SettingsDaemon.Power.Screen.StepDown >> /dev/null)
	else
		echo "Wrong option. Only 'up' and 'down' accepted."
	fi
fi