As Alan says: "The VIA driver doesnt appear to support the ac97 ops."
Here I'm attaching a brut force test, I created a small function that turns
ON the EAPD and another to turn it OFF. Note that according to dataseets a 1
will disable the external amplifier, but you should try with the two values.
I attached the modified code. It have a 1886 entry that will initialize the
codec setting EAPD output to 0. The code have a commented entry that does the
reverse, try both.
I also attached the diffs so Alan can check if that could work.
Note: I didn't compile it so watch for typos ;-)

SET

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Salvador Eduardo Tropea (SET). (Electronics Engineer)
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