All nice n fluffy but I cant start the NV Contol Panel because "user isnt using display connected to the nvidia device right now"...
going through this right now:
Have a look here https://ucdavistechtalk.wordpress.com/2012/05/29/how-to-switch-between-intel-graphics-and-nvidia-with-optimus/
At first comment, try his approach
Other than googling other ideas I'm out of fresh ones