Any follow-up information on your issue would be appreciated. Please have the courtesy to report back.
Where should a post on audio issues on a box with NO Ubuntu-based GUI at all? The audio devices disappear and reappear after a reboot then disappear again. This is according to aplay -l. Sure, it is "server", but ... none of the GUI solutions that tend to be offered are useful. I think it is a bad driver or failing hardware - can't tell yet. It all started after a recent kernel update. Not asking for help here, just pointing out that there are always exceptions when only the "distro" prefix is used. We are ALL DIFFERENT from most computer users after all, just by running Linux.
When I try to help with answers, avoiding the different GUIs is my preference. Much easier to ask them to open a terminal and run commands to get the answers - copy/pasted here - and not waste bandwidth with images. Asking for the output from sudo parted -l is much easier than asking for a very large image of a gparted screenshot so the details can be seen.
Of course, I'm probably in the 0,5% minority.