kernel already has a valid sound card, but pulseaudio doesn't have.

Please edit /usr/lib/systemd/user/pulseaudio.service

comment out the existing line starting with ExecStart and add a new one
ExecStart=/usr/bin/pulseaudio -vvvv --log-target=file:/tmp/a.txt

reboot

upload the /tmp/a.txt

thx.

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https://bugs.launchpad.net/bugs/1879462

Title:
  [Dell Inspiron 3790] pulseaudio module-alsa-card failed to find a
  working profile

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