ASUS laptop with Nvidia GEFORCE GT 620M (optimus card with intel and nvidia)

I tried all possible posts on the web and nothing seams to work

Did someone managed to get this working?

I tried drivers from the nvidia web site, drivers from the debian site, different combinations.
I have been at it for almost a week now and reinstalling kali linux everytime to make sure to start from scratch.

Need help.

Thanks to all