How to Configure Screen Brightness in mate on pinebook via terinal?

[mikee3000]

Thank you for the great advice @MarkHaysHarris777!
To get this work on my Pinebook (1080p - Arch image with i3) I had to change the file from  /sys/class/backlight/lcd0/brightness to /sys/class/backlight/backlight/brightness, the top value from 100 to 10  and the stepping to single digits. I'm not sure if this is due to the hardware or the os or both.

To get the max possible value: `cat /sys/class/backlight/backlight/max_brightness`

The script to raise the brightness then looks like this:

Code:

#!/bin/bash

LCDVALUE=`cat /sys/class/backlight/backlight/brightness`
NEWVALUE=$(( $LCDVALUE + 1 ))

if [ $NEWVALUE -le 10 ]
then
  echo $NEWVALUE > /sys/class/backlight/backlight/brightness
  echo $NEWVALUE
else
  echo $LCDVALUE
fi

and the one to decrease it (careful - this can completely dim the screen when the value gets to 0):

Code:

#!/bin/bash

LCDVALUE=`cat /sys/class/backlight/backlight/brightness`
NEWVALUE=$(( $LCDVALUE - 1 ))

if [ $NEWVALUE -ge 0 ]
then
  echo $NEWVALUE > /sys/class/backlight/backlight/brightness
  echo $NEWVALUE
else
  echo $LCDVALUE
fi

More info: https://wiki.archlinux.org/index.php/backlight