The program is called ironhide, it lets the user to enable and disable the VGA card as needed. In earliar days this has been called as Bumble-bee so its the continuation of the same project.

For more info :

How to install?

Open a terminal and enter these step by step:

sudo add-apt-repository ppa:mj-casalogic/ironhide
sudo apt-get update
sudo apt-get install ironhide

Now after couple of configurations you will be able to adjust the settings as needed for your VGA card.

Then you can simply type below commands to enable as well disable VGA card anytime!

1  ironhide-enablecard
2  ironhide-disablecard

Other commands.

ironhide-configuration - Initial configuration
ironhide-settings - Lots of different settings
ironhide-bugreport - Bug Report Utility
ironhide-submitsystem - Utility to submit working system infomation