So, we have a tripple confirmed "workaround" solution.
linux/Documentation/sound/alsa/ALSA-Configuration.txt
explicitly mentions:
options snd-hda-intel model="dell-3stack" for the "Dell Dimension E520", which does not work for posters.
whereas
options snd-hda-intel model="ref" works for Dell Dimension E520 users.
A regression in the Linux upstream kernel, or Ubuntu specific?
So, we have a tripple confirmed "workaround" solution.
linux/Documenta tion/sound/ alsa/ALSA- Configuration. txt
explicitly mentions:
options snd-hda-intel model="dell-3stack" for the "Dell Dimension E520", which does not work for posters.
whereas
options snd-hda-intel model="ref" works for Dell Dimension E520 users.
A regression in the Linux upstream kernel, or Ubuntu specific?