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

[MarkHaysHarris777]

---

Ok,  expanding on a theme, I have combined the scripts here into one script that takes two parameters;  the first is the direction ( U for up;  D for down ) and the second is the scalar value.


lcd_bright.sh

Code:

#!/bin/bash

MODE=`echo $1 |tr '[a-z]' '[A-Z]'`
LCDVALUE=`cat /sys/class/backlight/lcd0/brightness`

if [ "$MODE" = "U" ]
then
   NEWVALUE=$(( $LCDVALUE + $2 ))
   if [ $NEWVALUE -le 100 ]
   then
       echo $NEWVALUE > /sys/class/backlight/lcd0/brightness
       echo $NEWVALUE
   else
       echo $LCDVALUE
   fi
else
   NEWVALUE=$(( $LCDVALUE - $2 ))
   if [ $NEWVALUE -gt 30 ]
   then
       echo $NEWVALUE > /sys/class/backlight/lcd0/brightness
       echo $NEWVALUE
   else
       echo $LCDVALUE
   fi
fi

Run the script with :

       sudo  -i

       ./lcd_bright.sh  U  10

or

       ./lcd_bright.sh  D  10

Notes:
       The U and D  can be upper or lower case ( the script upper cases it for you ).
       The script might be changed to set a maximum or minimum based on parameter--  try it !