Estes

I really wish I knew. I spent the last 2-3 hours since I posted playing with zero problems. I can't believe it myself. As I've tried every solution I think possible up until this point. From getting the Inatech USB PCIe card thinking it was my motherboard USB ports 2.0, 3.0 and 3.1, all did the same thing.. I'm not sure how many times I swapped ports but it's more than I care to remember. The Inatech had the same result. Was starting to think it was the Asus Crosshair VI motherboard itself at this point.. Was beyond frustrated... And what do you know, a simple piece of tape. LOL wow, I don't know... I'm very glad it's working now. Almost feels too good to be true to be playing without issue and not worrying anymore. Finally having a smooth experience.

This is what fixed it for me. Covering up the left front sensor with some tape. Adhesive is all I could find for the time being as I did not take it very seriously when I saw the suggestion from Youtube. I did the usual(for the thousandth time), reinstalled USB, power cycled the base stations and booted SteamVR to test game again to see how long I could go before it would start grey screening again... Sure enough 10-20 minutes later, it started. So I covered the left front sensor with finger and lo'and behold, no more grey screen. Covered it with tape(as well as some on the bottom), issue seems to be solved... Very odd, but hopefully this will help someone. Maybe try the sensor on the right if the left doesn't work for you. http://imgur.com/MBz3q01