I now booted with and without "options snd-hda-intel dmic_detect=0". The first boot attempt froze the screen, and in the second the mic was working, but after 3-4 min the audio system "crashed". The Settings show https://pasteboard.co/Jo955xN.png . And in both cases I do see:
~$ apt list --installed | grep alsa-ucm-conf
alsa-ucm-conf/focal-updates,focal-updates,now 1.2.2-1ubuntu0.1 all [installed,automatic]
I now booted with and without "options snd-hda-intel dmic_detect=0". The first boot attempt froze the screen, and in the second the mic was working, but after 3-4 min the audio system "crashed". The Settings show https:/ /pasteboard. co/Jo955xN. png . And in both cases I do see:
~$ apt list --installed | grep alsa-ucm-conf conf/focal- updates, focal-updates, now 1.2.2-1ubuntu0.1 all [installed, automatic]
alsa-ucm-
so this package is installed.