Getting sound to work

Note: I suspect this page is not of very much use to anyone else, but I just want somewhere I know I can refer back to whenever I need to do this again.

I am using a Fujitsu Esprimo P5731 running a fresh installation (ie: not upgraded from anything else) of Devuan Beowulf.

By default, it tells me there are "no sound devices available", even though there's quite a variety of audio sockets on both the front and back of the machine.

I'm sure there's a way to get sound to work reliably, and long-term (ie: surviving reboots), but until I find out what it is, I need to do the following after a reboot (or, sometimes, when MS Teams simply decides it doesn't have a microphone any more):

pulseaudio --check
pulseaudio -D

The above commands should be entered as the logged-in user (ie: not as root) and neither should produce any output.

PS: I didn't deliberately buy a Fujitsu Esprimo; I basically got it free in an eBay auction for some network cameras I wanted, but €360 for eight Sanyo HD2100P PoE cameras complete with auto-iris lenses and two Netgear PoE switches seemed like a good enough price, so I didn't mind that it came with a 2 core 2.9GHz CPU, 12Mb RAM, 2Gb HDD computer as well (even if it is remarkably heavy, with an astonishingly chunky steel chassis construction).

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