No Sound "Dummy Output" Acer CB Vero 514 "Volmar"

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Chromebook Vero 513 “Volmar” 12th Gen Intel i7-1255U Alder Lake

I have installed various distributions - Ubuntu, Debian, Fedora - All have the same problem with this Alder Lake board and sound output. I have seen a previous thread where someone was asking about this issue but it doesnt appear to be resolved.

I have tried installing the sof script, it doesnt work quite right.

  1. When no headphones plugged in “dummy output” displayed and no sound.
  2. When plugging headphones into aux, sound plays from device speakers.

I have had to revert to Chromeos for work, but I would really appreciate if anyone out there is able to offer insight as to how to resolve this.

Thanks!