Laptop brightness keys(f3&f4) doesnt work

[anthony93]

@maharajg

case $1 in
    volume_up)
    # Unmutes and increases volume, then displays the notification
    pactl set-sink-mute @DEFAULT_SINK@ 0
    volume=$(get_volume)
    if [ $(( "$volume" + "$volume_step" )) -gt $max_volume ]; then
        pactl set-sink-volume @DEFAULT_SINK@ $max_volume%
    else
        pactl set-sink-volume @DEFAULT_SINK@ +$volume_step%
    fi
    show_volume_notif
    ;;

    volume_down)
    # Raises volume and displays the notification
    pactl set-sink-volume @DEFAULT_SINK@ -$volume_step%
    show_volume_notif
    ;;

    volume_mute)
    # Toggles mute and displays the notification
    pactl set-sink-mute @DEFAULT_SINK@ toggle
    show_volume_notif
    ;;

    brightness_up)
    # Increases brightness and displays the notification
    xbacklight -inc $brightness_step -time 5 
    show_brightness_notif
    ;;

    brightness_down)
    # Decreases brightness and displays the notification
    xbacklight -dec $brightness_step -time 5
    show_brightness_notif
    ;;
esac

Change the xbacklight -inc $brightness_step -time 5 in the case statement to brightnessctl -c backlight set +5%.

Change the xbacklight -dec $brightness_step -time 5 in the case statement to brightnessctl -c backlight set 5%-.