I plugged in my SPDIF out from my computer in PCM mode 96khz into the Hifiberry DAC+DSP and there is absolutely no audio. I tried looking for configuration options in the HifiBerry OS, but there are no hardware config options. when I select "sources" I just get a list of websites like "spotify" and other stuff I am not interested in.
I also noticed that the HifiBerry is defaulting to 4K resolution and I can barely move my mouse. It is very laggy and unresponsive. I tried to go to display options to bring down the resolution but there is no such option?!?!