I found an issue with that rc.local idea. It appears that those lines
need to be executed after gdm is running. I created a script that lets
you run it. Once running, press "i" to run the two lines that make
screen brightness work. One uses sudo so you will need to be able to run
that command. From there you can press either the up or down arrow keys
to change the brightness. You don't need to run "i" each time you start
the script, just each time gdm starts up. and obviously q will exit the
script.
Hope it helps. I know it can be cleaned up, but I'm more concerned about
a convenient and usable script. I keep this one in my ./bin.
#!/bin/bash
while true; do
clear
echo "up = Screen Brightness Up"
echo "down = Screen Brightness Down"
echo "i = Intialize Hardware"
echo "q = Quit"
read -s -n1 key
clear
case "$key" in
$'\033')
read -s -n1 key; read -s -n1 key
case "$key" in
A)
xbacklight -time 0 -steps 1 -inc 10 2>/tmp/sonybright.log
;;
B)
xbacklight -time 0 -steps 1 -dec 10 2>/tmp/sonybright.log
;;
esac
;;
i)
xrandr --output LVDS --set BACKLIGHT_CONTROL native
sudo /etc/init.d/acpid restart
;;
q)
clear
exit 0
;;
esac
done
--
unable to adjust screen brightness on recent Sony Vaio notebooks
https://bugs.launchpad.net/bugs/173652
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