On my original Vive. I could press the button on the side of the HMD and it would start the software.
On the Vive Pro the button doesn't seem to do anything.
Can this be fixed? It was kind of a nice feature not to have to mess with the keyboard/mouse.
Thanks for the report, we're looking into this. Are you trying to start the SteamVR via the button? Does it still function as a system button when the HMD is powered on and being driven by SteamVR?
Technical Specialist; San Francisco, CA
Yes, I believe the button started SteamVR on the old Vive. And yes, it does still function as a System button although that was news to me - I only ever used it to start VR.
Confirmed pressing this button triggers SteamVR. We may ask Steam to enable this on VIVE Pro.