I am using DietPi as a headless Home Assistant server and want it to run as low power as possible. I have tweaked the bios, DietPi configs, optimized with powertop and am reasonably happy with it running at about 3.8w (at the AC Adapter). I have also disabled the audio modules (saved about .5w). However, I still see pulseaudio running and would like to disable it. I have poked around in init.d and systemctl but cannot seem to locate where the service is being started from. Any insight would be appreciated.
For posterity, I am pretty sure I figured this out. It appears that Home Assistant supervised takes control of pulseaudio on the host system. If I stop docker, pulseaudio process stops as well. Details are in this thread: