You should try the model=3stack quirk, because your Dell's bios is
likely broken and contains an incorrect verb table for your HDA codec.
** Package changed: pulseaudio (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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No sound in Dell Inspiron 1420 in Jaunty
https://bugs.launchpad.net/bugs/363892
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