Hi A and jorrit,
I did a bit of experimenting on my lab system and found that my unit does the same thing. I had it waking itself up out of Sleep anywhere from 4 minutes to 12 minutes after being put to sleep via the Windows 8 start menu.
So, I ran powercfg (as follows) to see what was causing the wake event.
- Press the Windows button + W.
- Click the Apps button.
- Find the Command Prompt application under the Windows System section and right-click on it.
- Choose Run as Administrator.
- At the command prompt, type powercfg /lastwake
This will tell you what caused the wake. In my case, it was the LAN adapter. So, then in Device Manager, I opened the LAN adapter properties and on the Power Management tab, turned off all wake events except for 'wake on magic packet'. This appears to have solved the problem.
Intel Customer Support