I found a solution:
I made a script, with that i can control the brightness:
st...@stoto-laptop:~$ cat backlight.sh
#!/bin/bash
$act
act=`cat /sys/devices/platform/applesmc.768/leds/smc::kbd_backlight/brightness`
echo $1
case "$1" in
inc)
if [[ $act -lt 255 ]]; then
act=$((act+5))
echo $act | tee
/sys/devices/platform/applesmc.768/leds/smc::kbd_backlight/brightness
fi
;;
dec)
if [[ $act -gt 4 ]]; then
act=$((act-5))
echo $act | tee
/sys/devices/platform/applesmc.768/leds/smc::kbd_backlight/brightness
fi
;;
*) echo "Usage: inc or dec"
;;
esac
Save the script somewhere. I saved in my home, and made a symlink to
/bin/backlight.sh but its optional
I binded it to the brightness control keys in:
System -> Preferences -> Keyboard Shortcuts
Make 2 Custom shortcuts with the add button:
-BrightnessUp, command: /bin/backlight.sh inc
-BrightnessDown, command: /bin/backlight.sh dec
This is only working if you have access to the brightness control file.
Putting sudo in the command won't work, it works with gksudo, but then
you will have massive amounts of windows popping up when you hold the
brightness control key.
So the best solution i found:
sudo chmod 777
/sys/devices/platform/applesmc.768/leds/smc::kbd_backlight/brightness
It works like a charm.
--
[Jaunty] MacBook 5.1 keyboard backlight not supported
https://bugs.launchpad.net/bugs/337945
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