Bumblebee with lastest kernel 4.6

Bumblebee is not working with kernel:head 4.6.0-rc2-4.g52befbe-default, I get the following error:

primus: fatal: Bumblebee daemon reported: error: [XORG] (EE)  /dev/dri/card0: failed to set DRM interface version 1.4: Permission  denied

I have my user added to the required group and it was working with 4.5 but unfortunately sleep was not working on my laptop with the 4.5 kernel.