Ok, seen this discussed over at Reddit so can't take credit for this.
If you install the Hyper-V feature in Windows 10 on your Surface Pro 4 and reboot as prompted after the install you should now see your Surface Pro 4 enter Low Power mode (DRIPs) during Connected Standby sleep and see a lower...
I had the same jet engine like fan behaviour during the TH2 update, but have had minimal fan noise since. The Surface 2 RT has no fan and your Surface Pro 4 does, so I think your observations are quite normal for both devices! :)
Yes, I observe roughly the same drain after updating to TH2 and the new intel graphics driver (20.19.15.4308).
Rolling back the display driver to v10.18.15.4256 alleviates the problem with drain in Connected Standby for me, it goes from 4-5% per hour with the latest driver down to 1-2% with the...