I had issue installing Loki but I had it done with the help on an other post
see the post here for the whole topic
I managed to install the kernel 4.10 and nvidia 381. I turn off the dGPU with prime on the nVidia drivers, power consumption is low so ok (don't need the dGPU, i play game on Windows with dual boot)
My laptop configuration : i7 6700HQ, nvidia GTX950m, Samsung SM951 128GB M.2 PCI-e ACHI SSD
However, I have issue with the restart or shutdown, the system crash when i tried to do it. Same problem, i got system freeze when i'm pluging the power cable or any usb device...