Is this perhaps a more general problem .... I don't even think this is a Skylake CPU involved.
This is from the HP public support forum:
Windows 10 won't sleep or hibernate or boot properly
03-30-2016
01:27 PM
Product Name: ProBook 450 G0
Operating System: Microsoft Windows 10 (64-bit)
Hello!
Hello!
Recently I did a clean install of windows 10 and I've got a problem that I've forgot about from my past experience with this version of windows : my system can not go to sleep ( or it can't wake from sleep mode ) nor hibernate.
Example of situation : I put the system on sleep, it goes off ( the power button is still blinking - that's what it does when the laptop is on sleep ) and when I press the power button again ( or click on my mouse ) the system does not resume. Either it
starts like a fresh start ( like no sleep mode was ever there ) or the screen gets black, stays like that for a while and then shuts down ( and, of course, when I open it again it's like a fresh start ).
I have never encountered this type of problem on any other versions of windows. I have done almost ( if not all ) of suggestions and tutorials on the internet about this. The BIOS is up to date, so is my chipset driver along with the rest of my drivers. Is
it possible to fix this? It's the only thing that will make me go back to windows 7.
HP ProBook 450 G0 with:
Intel Core i7-3632QM
Intel HD Graphics 4000 / AMD Radeon HD 8600/8700M
8 GB RAM
KINGSTON SV300 240Gb SSD
P.S. : I found this link in which I found out that downgrading the bios to an old release would work, but I can not find older versions for my laptop.