Instructions on how to wire up your MacBook Pro function keys to control your laptop hardware in Crunchbang

common.sh

#! /bin/bash

case $1 in
    up)
        TOTAL=`expr $CURRENT + $INCREMENT`
        if [ $TOTAL -gt $MAX ]; then
            exit 1
        fi
        echo $TOTAL > $FILE
    ;;
    down)
        TOTAL=`expr $CURRENT - $INCREMENT`
        if [ $TOTAL -lt $MIN ]; then
            exit 1
        fi
        echo $TOTAL > $FILE
    ;;
    max)
        echo $MAX > $FILE
    ;;
    min)
        echo $MIN > $FILE
    ;;
    toggle)
        if [ $CURRENT -gt $MIN ];
        then
            echo $MIN > $FILE
        else
            echo $MAX > $FILE
        fi
    ;;
    *) echo "Invalid argument. Usage: `basename $0` up|down|max|min|toggle";;
esac

installation-instructions.md

Instructions on how to wire up your MacBook Pro function keys to control your laptop hardware in Crunchbang.

The end result of following these instructions are:

• F3/F4 adjusts screen brightness using intervals of 1. F1/F2 use intervals of 10.
• Apple cmd key + F3/F4 sets screen brightness to min/max
• F5/F6 adjusts keyboard brightness.
• Apple cmd key + F5/F6 sets keyboard brightness to min/max
• F7/F9 adjusts laptop fan speed.
• Apple cmd key + F7/F9 sets fan speed to min/max
• Eject button ejects disc drive

Installation

• mkdir /opt/control-hardware
• Download files
• Make files executable sudo chmod +x /opt/control-hardware/*
• Make files run as sudo without a password
  • sudo visudo
  • Add this line to sudoers file %sudo ALL=(ALL) NOPASSWD:/opt/control-hardware/*
• Edit openbox rc.xml
  • Add this

    <!-- Laptop fan -->
    <keybind key="XF86AudioNext">
        <action name="Execute">
          <command>sudo /opt/control-hardware/laptop-fan.sh up</command>
        </action>
    </keybind>
    <keybind key="W-XF86AudioNext">
        <action name="Execute">
          <command>sudo /opt/control-hardware/laptop-fan.sh max</command>
        </action>
    </keybind>
    <keybind key="XF86AudioPrev">
        <action name="Execute">
          <command>sudo /opt/control-hardware/laptop-fan.sh down</command>
        </action>
    </keybind>
    <keybind key="W-XF86AudioPrev">
        <action name="Execute">
          <command>sudo /opt/control-hardware/laptop-fan.sh min</command>
        </action>
    </keybind>
    <!-- Keyboard backlight -->
    <keybind key="XF86KbdBrightnessUp">
        <action name="Execute">
          <command>sudo /opt/control-hardware/keyboard-backlight.sh up</command>
        </action>
    </keybind>
    <keybind key="W-XF86KbdBrightnessUp">
        <action name="Execute">
          <command>sudo /opt/control-hardware/keyboard-backlight.sh max</command>
        </action>
    </keybind>
    <keybind key="XF86KbdBrightnessDown">
        <action name="Execute">
          <command>sudo /opt/control-hardware/keyboard-backlight.sh down</command>
        </action>
    </keybind>
    <keybind key="W-XF86KbdBrightnessDown">
        <action name="Execute">
          <command>sudo /opt/control-hardware/keyboard-backlight.sh min</command>
        </action>
    </keybind>
    <!-- Screen Backlight -->
    <keybind key="XF86LaunchB">
        <action name="Execute">
          <command>sudo /opt/control-hardware/screen-brightness.sh up</command>
        </action>
    </keybind>
    <keybind key="W-XF86LaunchB">
        <action name="Execute">
          <command>sudo /opt/control-hardware/screen-brightness.sh max</command>
        </action>
    </keybind>
    <keybind key="XF86LaunchA">
        <action name="Execute">
          <command>sudo /opt/control-hardware/screen-brightness.sh down</command>
        </action>
    </keybind>
    <keybind key="W-XF86LaunchA">
        <action name="Execute">
          <command>sudo /opt/control-hardware/screen-brightness.sh min</command>
        </action>
    </keybind>
    <!-- Eject disc drive -->
    <keybind key="XF86Eject">
        <action name="Execute">
          <command>eject</command>
        </action>
    </keybind>

• Restart openbox

Optional display current values on your desktop using Conky.

Add this to .conkyrc

    Fan Speed: $alignr ${exec cat /sys/devices/platform/applesmc.768/fan1_output }
    Screen brightness: $alignr ${exec cat /sys/class/backlight/nv_backlight/brightness }
    Keyboard brightness: $alignr ${exec cat /sys/class/leds/smc::kbd_backlight/brightness }
    ```

keyboard-backlight.sh

#! /bin/bash

DIR="/sys/class/leds/smc::kbd_backlight"
FILE="$DIR/brightness"

MAX=$(cat $DIR/max_brightness)
MIN=0

CURRENT=$(cat $FILE)
INCREMENT=15

CWD="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
source "$CWD/common.sh"

laptop-fan.sh

#! /bin/bash

DIR="/sys/devices/platform/applesmc.768"
FILE="$DIR/fan1_output"

MAX=$(cat $DIR/fan1_max)
MIN=$(cat $DIR/fan1_min)

CURRENT=$(cat $FILE)
INCREMENT=100

# Enable manual control of fan
echo 1 > "$DIR/fan1_manual"

CWD="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
source "$CWD/common.sh"

screen-brightness.sh

#! /bin/bash

DIR="/sys/class/backlight/nv_backlight"
FILE="$DIR/brightness"

MAX=$(cat $DIR/max_brightness)
MIN=0

CURRENT=$(cat $FILE)
INCREMENT=1

CWD="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
source "$CWD/common.sh"