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

[MarkHaysHarris777]

I found this, but it is not working with sudo, only after sudo su

Code:

root@pinebook:/home/pine64# echo 50 > /sys/class/backlight/lcd0/brightness

---

Okay, now is the question how to make my own xbacklight with -dec 10 and -inc 10 to bind this for keyboard keys

... two scripts , one for key +  one for key -

Your script needs to read the value into a variable ,  add 10 to it ,  and then write the variable back out;  but, only if the +10 will not exceed 100.

Do the same for the minus key binding, only don't allow it to go below say 30 ( idk, experiment ).

also,  try:    sudo  -i

---

Ok, here are the scripts :

---

lcd_plus.sh

Code:

#!/bin/bash

LCDVALUE=`cat /sys/class/backlight/lcd0/brightness`
NEWVALUE=$(( $LCDVALUE + 10 ))

if [ $NEWVALUE -le 100 ]
then
   echo $NEWVALUE > /sys/class/backlight/lcd0/brightness
   echo $NEWVALUE
else
   echo $LCDVALUE
fi

lcd_minus.sh

Code:

#!/bin/bash

LCDVALUE=`cat /sys/class/backlight/lcd0/brightness`
NEWVALUE=$(( $LCDVALUE - 10 ))

if [ $NEWVALUE -gt 30 ]
then
   echo $NEWVALUE > /sys/class/backlight/lcd0/brightness
   echo $NEWVALUE
else
   echo $LCDVALUE
fi

try running them with  :

     sudo  -i

     ./lcd_plus.sh

     ./lcd_minus.sh

Now all that has to be done in i3 is to bind them to a keysym  using exec !
Works well.



Note:  of course,  you could combine them into a single script and pass a parm (up) or (down) 

try it !