#!/bin/bash function send_notification() { brightness=$(printf "%.0f\n" $(brillo -G)) dunstify -a "changebrightness" -u low -r 9991 -h int:value:"$brightness" -i "brightness-$1" "Brightness: $brightness%" -t 2000 } case $1 in up) brillo -A 5 -q send_notification $1 ;; down) brillo -U 5 -q send_notification $1 ;; esac