wujstefan wrote: ↑Wed Feb 07, 2018 6:41 am
It just keeps spinning the fan until there's no battery left or until I keep pressing on/off button couple of seconds so I've got no output from the system what actually went wrong.
I take it that you waited for more than 15 minutes? The reason I said 15, is because 10-15 minutes is usually the timeout of Bugcheck 9F (driver fails to complete a power state transition), and that's a very common cause of system that hangs when trying to enter sleep. When the timeout expires, the system will crash with a 0x9F BSOD. If you waited for more than 15 minutes and the system still has not crashed, it may be something else.
However, it may crash and not restart, so just to be safe, after you waited for about 20 minutes, and you turn it off forcefully - next time you boot up - check if there was a Windows\Memory.dmp file created, or whether there are any new files under Windows\Minidump.
wujstefan wrote: ↑Wed Feb 07, 2018 6:41 am
I've googled this problem a bit, and it seemed windows-related since more people are facing that.
Everything is Windows-related. That does not mean it's a bug in Windows. Because as I said - working power management requires all components (OS, drivers, firmware, and hardware) to cooperate. Most of the time problems like this are firmware/driver bugs, very rarely it's in a bug in core Windows code.
As a rule of thumb - keep in mind that when you google anything related to power management bugs, you are likely to find 99% garbage, and (if you are lucky), 1% accurate, useful information. Sifting it through the junk is typically far from easy.