VR preview not working

Hi,

I have the Oculus rift working with the Oculus desktop apps (Latest Oculus Rift PC runtime installed : https://www.oculus.com/en-us/setup/) and I can see it in the VR headset .
But when I go to Unity and trying to get the VR preview, nothing is working. Except on my display, the view is changing for the camera look (what is normal).

Do you have any idea where that can come from?
Also my Graphic card is Quadro K5200.

Gauthier

 

Also right now Unity is crashing when I use an OVR camera and when trying to VR preview, But nothing happens when I Use the strandard Unity camera

 

Same problem here. Runtime 0.8 Unity 5.4 beta