Change in steamvr.vrsettings causes Index headset to crash

[BOLL7708]

So this is pretty... weird. I have not yet been able to pin-point exactly what in the settings actually caused the problem, so this is more of a... take a look if you're bored issue?

I was going to stream a game using LIV, so I turned on Trackers and LIV, and changed some settings in SteamVR and... uhoh, my Index headset showed solid red LEDs on it. Curious. Did all debugging I could think of but it kept crashing, SteamVR also tended to break when closing it, only a power cycle of the headset would reset it between tries.

In the end, I connected the headset to a second PC, and it was fine. One difference I could think of: steamvr.vrsettings, so I hooked it up to my primary PC again but also cleaned out a few things I imagined it could be from the settings, like all stored tracker roles and some values that seemed odd in the steamvr section. And blammo, the headset worked again. Just to double check, it still breaks with the old settings file, which I had backed up for posterity.

As first mentioned, I have not been able to pin-point what exactly it was that broke the headset, but, I have the settings here on Github as gists, so if you want to compared/debug it, here you go:

• 🔴 This breaks my Index HMD 🔴 : steamvr.vrsettings
• 🟢 A few changes and it works 🟢 : steamvr.vrsettings