Hello,

I had the same problem for a long time. For me, the cause is the graphics driver (I have intel and amd graphics in Switchable Graphics). Here's what I did:
- disable fast boot (in power management), and reboot computer
- go into register (regedit.exe), look for 'enableULPS'. You will probably see two results next to eachother. Set both keys to zero.
- Turn fast boot back on and restart computer again.
- Go back to register and check if those keys still have value zero (if not: change them back to zero and reboot).

That solved it for me...