Hi,
sorry for keeping you waiting so long. I was very busy and didn’t have the opportunity to reply to you.
Here is my solution. Enjoy… :)

Open your terminal and enter the following command:

$ sudo hcitool dev

The last command will display the output for your device such as:

Devices:
hci0 00:00:00:00:00:00

Install a new package to allow you to connect bluetooth via the command line.

$ sudo apt-get install bluez-compat

Once this has completed, you will now have hidd program installed. At this point, turn on your controller in gamepad mode and enter the following command. It will output the MAC Address of your keyboard, which you will need to copy and paste into the subsequent command, as seen below:

$ hcitool scan
Scanning …
AA:BB:CC:DD:EE:FF Bluetooth Device Name
$ sudo hidd –connect AA:BB:CC:DD:EE:FF

Now we have to create a startup file to auto connect the device when the pc starts. Via the terminal…

$ gedit ~/.keyboard.sh

Enter the following text, substituting AA:BB:CC:DD:EE:FF with the hardware ID you saw above. Finally, save the file.

#! /bin/bash

address=”AA:BB:CC:DD:EE:FF”

while (sleep 1)
do
connected=sudo hidd --show > /dev/null
if [[ ! $connected =~ .*${address}.* ]] ; then
sudo hidd –connect ${address} > /dev/null 2>&1
fi
done

Now create a new startup file. Substitute “keyboard” for whatever device name you choose. This is simply the name of the file.

$ sudo gedit /etc/init.d/keyboard

Paste the following, which tells your Ubuntu to run the file you just created at startup.

#!/bin/sh
/home/ubuntu/.keyboard.sh &

exit 0

Now set both files permissions to executable via the terminal.

$ sudo chmod +x /etc/init.d/keyboard
$ chmod +x ~/.keyboard.sh
$ sudo update-rc.d keyboard defaults

Restart your computer and your device should auto connect and be working without you having to do anything.

I hope this helps a few people, it took me a long time to find a solution to my problem and I wanted to cement this tutorial a little deeper into the web.

This is my source: https://askubuntu.com/questions/17504/how-can-i-have-a-bluetooth-keyboard-auto-connect-at-startup

Please note that this is a quick and dirty way of doing this, and that the link is old and so are the commands. You till receive a warning when doing “sudo update-rc.d keyboard defaults” telling you that this method is deprecated. A google search would tell you straight away what to do.