DK2 turned on and in extended mode.
VorpX in the Tray.
“Do not use an Oculus profile” in Oculus profile.
Tried with the Rift in secondary display with “Show only on DK2”, and in primary display with “Use system setting” (display on the DK2 but in 2D without eyes separation ^^).
Fresh install off Skyrim.
Desactived the Steam overlay.
Tried the restoration and the factory reset in trouble shouting.
Nothing work ;)