[ubuntu] LENOVO YOGA 300 - 11IBY, Hibernate, waking up returns black/blank screen

Hello,

i bought the LENOVO Yoga 300 and made a fresh install of UBUNTU 16.04 LTS (beta2).
Everything is working out of the box, except hibeate.

When i close the lid and reopen it, the Display remains black. I have to hardreset/restart the System.

Can you please advice me the direction to go, to get this last feature working?

Thank you.