After a bit of a hiatus, I updated the UP Board to Kernel 4.11-rc8, and HDMI sound is now supported.. In the kernel config, under ‘ALSA for SoC audio support‘, select ‘X86 sound devices‘, and ‘HDMI audio without HDaudio on Intel Atom platforms‘ After (re)boot to 4.11-rc8: [rgadsdon@rgup ~]$ ll /dev/snd total 0 drwxr-xr-x 2 root root … Continue reading →