Surface Pro 4 - Screen won't wake from sleep

IT'S BAAAAAAACK.  After several months with no Fail to Wake/Sleep of Death events, I've had three in the past two days.  Always after at least a few hours of non-use.  My SP4 was dead and completely unresponsive in the morning yesterday and today, and failed again later this morning - all three requiring YAPORRAC  (Yet Another Power-off, Reboot, Restart apps Cycle).  If I had to guess, the culprit is KB3150513, as that is the last update applied before things started failing (although oddly, for me, the failures didn't start until this past weekend, which was a few days after that update was applied on the 15th.  KB4015438 was applied yesterday, but there were two failures before that update.

I suppose we're left just praying that the Creators Update due in a couple of weeks will once again kill off the Sleep of Death for good.  Microsoft's inability to keep this bug squashed doesn't inspire confidence, though....

Make sure you've got all the updates applied after your reset - this can take several update cycles, since some of them apparently need to be applied in series.  Since shortly after the Anniversary Update, my SoD or failure to wake problems have vanished.

Battery life still sucks compared to my SP3,but that's just because the SP4 has a smaller battery (that's why it's a bit thinner), since Microsoft believed Intel's lies that power management in Skylake would allow longer life with a smaller battery.  In the immortal words of Otter(Intel) to Flounder(Microsoft & SP4/SB buyers), "You f----d up.  You trusted us."

ARM-based Windows machines may well be my next computers.  I'll certainly do what I can to avoid buying Intel from here on out, based on their proven inability to deliver quality products.

interesting, I decided to do a Reset of Windows because of other bugs and it has come back! Sleep by closing with the touch keyboard and an hour later, no wake. Maybe I'm the only one left here but it's a year and a half now. Very frustrating.

If there are any MS engineers still monitoring this, any suggestions?

It appears some people are experiencing a problem where it appears the SP4 is now hibernating earlier than the setting you have enabled via Settings/Control Panel. MS did make a change recently to the OS that enables an Adaptive Hibernate by default. Details in the article below.

https://msdn.microsoft.com/en-us/library/windows/hardware/mt732711(v=vs.85).aspx

That was great info! Now, Microsoft have apparently gone out of their way to make this non-discoverable for mere customers like me, but I was able to see that my StandbyBudgetPercent was 5%, meaning that the SP4 would hibernate after losing 5% battery charge. However, in my experience it's more like 1% (see my update below). I'm changing it to 10% to and also disable UserPresencePrediction and we'll see what happens.

Tip: I couldn't use POWERCFG to query the values for these new parameters. In fact, I'm not able to query any single setting, except all at once with the /QUERY flag without any GUIDs. The good news is that if you're willing to muck around in your registry, yo,u can "unhide" these and other settings from the Power Settings UI in the Control Panel. Just go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\8619B916-E004-4dd8-9B66-DAE86F806698, which is the hidden SUB_PRESENCE group and change the value of the Attributes keys for individual settings (one level down) from 1 (hidden) to 2 (visible). Then, open advanced power settings and tweak the values to your heart's content. (In fact, you can unhide all power settings that have been hidden on a standard SP4 install this way.)

Update: According to POWERCFG /SLEEPSTUDY, the system dozes to hibernation because "the user was predicted to be away" after only 30 minutes. Does this mean that you can't leave your PC on a table for more than 1/2 hour before it hibernates? That's absurd! In what way is this "Modern Standby", which is the fancy new word for the fancy new feature that probably is what makes waking from sleep such a gamble?