Well, that fixed it.
I captured the asound.state file from the liveCD and ran xxdiff against
that file and the one from my production OS. Although the files were
the same size they were different in config. Honestly, I haven't
drilled that deeply but xxdiff shows right where to look.
I backed up the asound.state and copied the working version to that same
name, ran alsactl restore and ... that's it.
So I'll try to go back and understand what changed.
Much obliged to everyone, and thanks for your patience.
James Cameron wrote: