Had an early 15xx lot number and was having the not waking issue 90% of the time. Spoke to MS info desk and they walked me through a bunch of BS before telling me I was eligible for a replacement. About 3 days later I received my replacement unit (I believe
lot 1604) and had no issues. Woke EVERY TIME without fail. About a week into having it I put insider builds on it and still no issues.
Not a single issue for over a month. Kept getting insider builds and got all the way up to build 15332 and then I started having an issue where every time I hit the power button, or let it go to sleep on its own,
it would immediately go into hibernate. Changed the hibernate time to 240 minutes, same issue. Changed it back to the default 120mins, same issue. I then decided to disable hibernate by typing in powercfg.exe /h off into cmd prompt. This fixed the hibernating
issue, and all was well again. Woke every time, no issue. I then updated to build 15342, and NOW the sleep of death issued appeared. Back to 90% of the time the computer wouldn't wake up and the only way to bring it back was to hold the power button for 15secs
and restart. Turned hibernate back on with cmd prompt, same issue. Sleeep of death over and over again. Deleted all the firmware drivers, reinstalled them all, deleted the display driver, reinstalled, same issue. Sleep of death 90% of the time.
I then decided to roll back to build 15332, and the sleep problem disappeared. Turned it off with the power button, let it sleep on its own, wakes EVERYTIME. With build 15442 sleep of death, with build 15342 no issues. Seems to be some sort of a software/driver
issue to me..... Not saying its the build causing the issue, just something that happens when its upgraded, something with drivers, OS refresh, something......
UPDATE: Rolled all the way back to a Non Insider image I had stored. Then updated to 15442 and everything is working fine again. No sleep of deaths, no hibernation issues.