1. install arandr

   sudo apt-get install arandr

2. save 2 configurations, one for monitors attached on docking, another for laptop only.

   ~/.screenlayout/dock.sh ~/.screenlayout/undock.sh

3. add new udev rule:

   vi /etc/udev/rules.d/81-yourlaptop-dock.rules

   KERNEL=="dock.0", ACTION=="change", RUN+="/YOURLOCATION/yourlaptop-dock.sh"

   chmod +x /etc/udev/rules.d/81-yourlaptop-dock.rules

4. create /YOURLOCATION/yourlaptop-dock.sh (a script that should be run by the udev rule)

vi /YOURLOCATION/yourlaptop-dock.sh

    #!/bin/bash
    sleep 1
    DOCKED=$(cat /sys/devices/platform/dock.0/docked)
    case "$DOCKED" in
            "0")
            #undocked event
            ~/.screenlayout/undock.sh
            ;;
            "1")
            #docked event
            ~/.screenlayout/dock.sh
            ;;
    esac
    exit 0

5. chmod a+x /YOURLOCATION/yourlaptop-dock.sh