Hello, I am new to posting on these forums but I have been reading them for a bit. I appear to be having the problem with windows 10 that prevents windows from staying asleep. To be more specific every time I shutdown, go into hibernate, or go to sleep, the computer only briefly turns off and then turns itself back on immediately. Worse is that I had fixed this problem previously and it worked fine for 2 weeks and then randomly yesterday it started doing it again. I didn't update any drivers or anything that I know of in the mean time. I have tried every single thing that has been recommended on the forums that I can tell and nothing seems to fix it. I have tried disabling fastboot, disabling the intel management engine, updated all of my drivers and bios, wake alarms are all off, there are 0 items in powercfg that are allowed to wake the computer, lastwake shows literally nothing woke the computer up, and also tried about a million other things that have been recommended on this forum and to no avail. My laptop is a dell xps 13, the new refresh from the end of last year.
Solved - Hope this helps someone maybe so I'm keeping it here, the fastboot issue was the problem, but it wasn't what I thought. For disabling fastboot under the power options to work, you have to make sure it is ENABLED in the bios. I had disabled it in the bios 2 weeks ago and that is what fixed it initially. So when I disabled it in the power options I went back in and enabled it in the bios and the computer works again. Hope maybe this helps someone. 3 hours later and the fix is that stupid, hope I didn't waste anyone's time.