I have experienced the same problems on all of the (many) Surface Books I have exchanged. No matter what I do the SB will crash during Sleep and or Hibernate after a few hours. It isn't evident until you open the SB screen to find out it has shut down. Any
Apps, Web Pages or files that were still open when the SB went into Sleep will be lost/closed.
I have previously posted the (extensive) list of everything both the Microsoft Store techs and I have tried to do, including the suggestions on this and other forums that I have been able to find. Examples: running sfc /scannow (finding unrepairable errors),
repairing with DSIM off a clean MS image, completely reimaging the SB, turning off Fast Start, forcing Sleep only, forcing Hibernate only, restoring default Power settings, turning off WiFi connected while in Sleep, rolling back updates, testing Sleep and/or
Hibernate with power connected or on battery power. None of these has resolved or had and discernable effect on the Sleep crash issue on multiple SBs with different lot numbers. After a few hours in Sleep or Hibernate the SB crashes. Consistently. MS online
support has no solution other than the usual "do you have all updates installed?", hard re-boot, reset, reimage, etc. The technicians at the several stores I have been to during my business travels have tried everything they can think of with no success. They
usually end up loading a new image. Then I leave the SB with them in the store in Sleep mode and when I come back a few hours later we open the SB to find it has shut down, with a critical error logging the event. They are stumped. I am really surprised that
by now they don't seem to have any information from Microsoft about this. Given that I have personally observed this on multiple SBs/lot numbers and many others have posted the same issue on this and other forums I have to believe this is a problem with most
if not all SBs. I suppose some owners do not use Sleep/Hibernate, don't leave anything open when using Sleep (thus the reboot has no obvious impact), don't care if it reboots during Sleep, don't realize it is rebooting or don't bother reporting it.
Simply put Sleep/Hibernate does not work on the SB, and apparently on the Pro 4 from what I have read. Not if you expect to start where you left off before the SB enters Sleep. We have to accept that this feature does not work. I don't know if it will ever
get fixed on the SB. Maybe in SB2 or a later version of Windows 10, maybe not. If you decide to keep your SB my advice is for now close all your Apps and save all files and shut down the SB if you will be away from the SB for more than a coupe hours. Or expect
to find a rebooted machine when you return.
Microsoft remains strangely silent. There is no way they cannot know about this or are unable to reproduce it. I have reproduced it easily on multiple SBs. I have to assume that they are aware of the problem and are unable to fix it yet, or won't fix it.
That suggests (to me) that it might be a hardware problem that could result in an expensive recall. This isn't an accelerator pedal sticking type of problem so it won't get that kind of publicity or create serious liability.
If there is a solution to this Sleep issue out there I haven't found it. I gladly welcome any suggestions.
Microsoft, if you are listening - I want to be happy with my SB purchase decision. There is much to like about this unique machine, but as we enter our seventh month from product release and simple functions like Sleep don't work reliably I cannot say I
am a satisfied customer, yet. A little post-decision dissonance reduction would be helpful. :)
All I can do now is remember to be far more careful when considering my next MS hardware purchase.