Yes you would think it was that simple but it is not. Especially if used as a tablet, then getting it to realise there is even meant to be a graphics card is a nightmare. Telling us its easy to fix each time by following any number of steps is not the point - it should just work, I am sad it does not.
I was so excited to finally upgrade to a surface book but I wish I hadn't. I now hardly ever use it as a tablet and dread shutting it down or doing an update as I dont trust it will see its own graphics card if I do. This makes a mockery of the Book's signature feature.
Admittedly when it works it is a lovely machine.