Probably a AMD problem.
@Jeremy_Billheimer
Also see
Actually the whole thread is highly informative.
The curious is that not all units are affected. Mine (though the Sixteen, use the same chip). No problem whatsover.
Could be that the 7840U/HS reference design is different. I dont know, but seems like this is a widespread issue. Quick search reveal quite the large amount of content.
Unrelated. @Jeremy_Billheimer
BIOS 3.0.7 is out. Try it.
Report from Arch Linux Forum says it seem to have fixed sleep.