I am experiencing the same problem as well. Instead of hibernation, I believe it actually turned off because the Microsoft logo will pop up and that happens when you turn on your Surface right?
I have the i7/8GB RAM/512GB Model
Power Mode doesn't matter as it happened under all mode.
When it happens, only type cover (SP4 version) is attached, and it is on battery (not plugged in)
I have inspected the event viewer, the following warnings can be found every time after the sudden "death" of the SP2017:
- The local adapter does not support an important Low Energy controller state to support peripheral mode. The minimum required supported state mask is 0x491f7fffff, got 0x1fffffff. Low Energy peripheral role functionality will not be available.
- The application-specific permission settings do not grant Local Activation permission for the COM Server application with CLSID {D63B10C5-BB46-4990-A94F-E40B9D520160} and APPID {9CA88EE3-ACB7-47C8-AFC4-AB702511C276} to the user NT AUTHORITY\SYSTEM SID (S-1-5-18) from address LocalHost (Using LRPC) running in the application container Unavailable SID (Unavailable). This security permission can be modified using the Component Services administrative tool.
- The system has returned from a low power state. Sleep Time: 2017-06-19T16:28:27.177108900Z Wake Time: 2017-06-19T16:28:48.378997100Z Wake Source: Unknown [I personally think this is the most crucial one?]
Kinda frustrated, as I just got the new machine for 2 days :(