Any updates to this? I am also having a very similar issue with the HTC Pro. The screen will turn all grey after about 5 min of play and will only come back if I reboot SteamVR or the breakout box. The controllers and base stations remain green but the headset goes to flashing green and says "connected but tracking lost". Searching around the forums it seems like a few people have had this issue. I have tried reinstalling SteamVR, disconnecting all other USB devices, disconnecting all secondary monitors, removing and reinstalling the headset USB devices, updating drivers, and even covering my windows. All the same result, the headset will work perfectly for ~5min and then lose tracking. I have a Win10 PC (fresh install), AMD2600X, Geforce1080, 16GB RAM, and a ASUS ROG STRIX B350-F motherboard.
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