Ok, je viens de comprendre le problème ...
Sur un forum :
That is the wonderful thing about the G750 series, Asus completely ignored the Optimus video and only implemented the discrete GTX card - so no annoying Optimus switching issues
Puis :
No optiumus in G750, you don't see the HD4400 onboard graphics in device manager as its disabled.
Et encore :
As far as I am aware and I could be wrong, there is no optimus technology enabled in the G750 Series, although the CPU has a GPU on die it is not enabled and therefore you are only able to use the discrete graphics card, why would you want to use the on-board GPU anyways its a gaming laptop.
Et enfin :
No the g750 series does not use Optimus. It is because the screen is directly connected to the nvidia GPU. Optimus is only available when the screen is connected to the processor's GPU. Whether this was a smart move on asus's part is being hotly debated.
Que fait-on?
La raison pour laquelle les drivers nouveau ne fonctionnent pas est donc là?
On oublie bumblebee? Je reste avec les drivers propriétaires? C'est le plus adapté je pense.