More detailed Acer (Intel HDA)

[Rimas Kudelis <rq@akl.lt>]

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Hi Jonathan, Takashi, and others,

I asked a user on Ubuntu forums to test Acer jack modes more
extensively. The results are a bit surprising. You may want to check
out http://ubuntuforums.org/showthread.php?p=825101#post825101.

It's strange for me that it seems like Mic Preamplifier seems to be
always off for LINE1 channel.
It's also a bit strange that a jack connected to MIC1 always outputs
in mono when set as output, but maybe that's just how Acer engineers
decided it should be.
And the third interesting thing is that the user could not select Mic
modes at all for LINE-OUT channel. Did I skip this part in the
datasheet, or is it undocumented?

Also, is there really a difference between Mic 50% and Mic 80%? Maybe
it's enough to only make one of these modes available in the mixer if
there's no big difference between them? Same goes for
Headphone/Line–Out modes. What airbuds did you mention previously (you
said Headphone mode might be useful for them)? Is it those small
headphones that one can put INTO their ear and then hear poor sound?
:) I don't have them handy ATM, so I can't test if there's any
difference between Line-Out and Headphones modes for them...

regards,
Rimas



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