HDMI Output only detects 2 channels not 5.1
I've connected my Dell XPS 13 9350 to my AVR 5.1 surround sound home theater system. Unfortunately the HDMI only outputs 2 channels and is greyed out, not allowing me to select 5.1 or 7.1. How do I update or upgrade my Realtek audio drivers to support more channels?
My issues are similar to this thread for windows vista, but no one seemed to have a fix
Could someone help me get 5.1 output from my HDMI source?