alikus@hostalikus:/etc/acpi$ cat video_brightnessdown.sh
#!/bin/bash

CURRENT=$(grep "current:" /proc/acpi/video/VID/LCD/brightness |awk '{print $2}')


case "$CURRENT" in

12)
echo -n 12 > /proc/acpi/video/VID/LCD/brightness;
;;
24)
echo -n 12 > /proc/acpi/video/VID/LCD/brightness;
;;
36)
echo -n 24 > /proc/acpi/video/VID/LCD/brightness;
;;
48)
echo -n 36 > /proc/acpi/video/VID/LCD/brightness;
;;
60)
echo -n 48 > /proc/acpi/video/VID/LCD/brightness;
;;
72)
echo -n 60 > /proc/acpi/video/VID/LCD/brightness;
;;
84)
echo -n 72 > /proc/acpi/video/VID/LCD/brightness;
;;
100)
echo -n 84 > /proc/acpi/video/VID/LCD/brightness;
;;
*)
echo -n 12 > /proc/acpi/video/VID/LCD/brightness ;
;;
esac



alikus@hostalikus:/etc/acpi$ cat video_brightnessup.sh
#!/bin/bash

CURRENT=$(grep "current:" /proc/acpi/video/VID/LCD/brightness |awk '{print $2}')


case "$CURRENT" in

100)
echo -n 100 > /proc/acpi/video/VID/LCD/brightness;
;;
84)
echo -n 100 > /proc/acpi/video/VID/LCD/brightness;
;;
72)
echo -n 84 > /proc/acpi/video/VID/LCD/brightness;
;;
60)
echo -n 72 > /proc/acpi/video/VID/LCD/brightness;
;;
48)
echo -n 60 > /proc/acpi/video/VID/LCD/brightness;
;;
36)
echo -n 48 > /proc/acpi/video/VID/LCD/brightness;
;;
24)
echo -n 36 > /proc/acpi/video/VID/LCD/brightness;
;;
12)
echo -n 24 > /proc/acpi/video/VID/LCD/brightness;
;;
*)
echo -n 100 > /proc/acpi/video/VID/LCD/brightness;
;;
esac
alikus@hostalikus:/etc/acpi$