An issue of virtual reality camera 's rotaion initialization with unity 5.3.3p1

I want to set my camera rotation is the value of I in editor mode,But when I have connected oculus rift It will change my camera rotation ,Lead to VR camera change after the rotation of the camera is not what I want.

Hope to be able to help me solve this problem Thank you for your attention

system
win7
unity5.3.3p1
oculus rift dk