Ubuntu – Can’t suspend to ram since linux 3.8 kernel – 16.04LTS

16.0420.04kernelmotherboardsuspend

With ASRock N68C-S UCC motherboard, suspend always works until ubuntu 12.04 include.
But not since 3.11 kernel (even with 12.04).
Also, suspend don't work with 14.04 and 16.04.
I would like to make it work with 16.04.
Any advice welcome.
Thanks.