Workaround to a crash with DK2 and NVIDIA

Hi there,

I have been developing an application for a pretty long period now. Ghosts Of Hogwarts V3 (https://share.oculus.com/app/ghosts-of-hogwarts).
It is becoming ready but I have troubles with the runtime 0.7 and I simply can't finish to develop and make it ready for upload.
Unity is crashing on playmode when the DK2 is plugged in and with the NVIDIA graphic processor.
I HAVE to use the NVIDIA processor because of performances. 15fps with integrated processors and approx 65fps with NVIDIA. Unity with DK2 and NVIDIA crashes on playmode AND when I go to "Quality" window.
It works great when the headset is unplugged or "VR Supported" unchecked. And it was working great with runtime 0.6.

I have tried Oculus runtime 0.7 and 0.8.
I have tried NVIDIA driver 359.06 and 344.75
And also tried with a whole new Unity project. It never works with NVIDIA and the DK2.
Also I know it is wrong but I have no choice, I work on a high end Asus ROG laptop windows 8.1 64bits Intel Core i5, 16Go of RAM.

I really need a workaround to be able to release this new version... Does any of you have any idea?