Been using my DK2 with LFS happily for a couple of weeks now - but then I installed the latest G patch and now in game after I select 3D I get the message cannot initialise the rift headset?
anyone know how to solve this?(note I am running it with the 0.4.1 runtime which I used since I got the DK2) - I also get a blue light on the rift and run it in extended mode.

Oculus Runtime 0.4.2 (or later) is required.

Source: Patch 6G information page