Change backlight settings in Fedora 29 MATE

bklight.sh

#!/usr/bin/env bash

CURRENT_LEVEL=$(pkexec --user root mate-power-backlight-helper --get-brightness)
if [ $1 == "get" ]; then
    echo -e "\nCurrent Level: $CURRENT_LEVEL\n"
    exit 0
elif [ -z $1 ] || [ -z $2 ]; then
    echo -e "\nUSAGE: change-backlight <inc|dec|set|get> [<val>]\n"
    exit 0
fi
if [ $1 == "inc" ]; then
    if ! [ $(($CURRENT_LEVEL + $2)) -ge "1060" ]; then
        NEW_LEVEL=$(($CURRENT_LEVEL + $2))
        pkexec --user root mate-power-backlight-helper --set-brightness $NEW_LEVEL
    else
        pkexec --user root mate-power-backlight-helper --set-brightness 1060
    fi
elif [ $1 == "dec" ]; then
    if ! [ $(($CURRENT_LEVEL - $2)) -le "0" ]; then
        NEW_LEVEL=$(($CURRENT_LEVEL - $2))
        pkexec --user root mate-power-backlight-helper --set-brightness $NEW_LEVEL
    else
        pkexec --user root mate-power-backlight-helper --set-brightness 1
    fi
elif [ $1 == "set" ]; then
    if ! [ $2 -ge 1060 ] && ! [ $2 -le 0 ]; then
        NEW_LEVEL=$2
        pkexec --user root mate-power-backlight-helper --set-brightness $NEW_LEVEL
    elif ! [ $2 -ge 1060 ]; then
        pkexec --user root mate-power-backlight-helper --set-brightness 1
    else
        pkexec --user root mate-power-backlight-helper --set-brightness 1060
    fi
else
    echo -e "\nUSAGE: change-backlight <inc|dec|set|get> [<val>]\n"
fi

Inspiration:

• Couldn't quickly get xbacklight working... lost patience decided to do it myself using the MATE tools (which i could get working).

Instructions:

• Place file with execute permissions in /usr/local/bin/

Add HotKeys:

• Increase Brightness:
  • name: brightness+
  • command: bklight inc 10
  • key_assign: <increase_brightness_key>
• Decrease Brightness:
  • name: brightness-
  • command: bklight dec 10
  • key_assign: <decrease_brightness_key>