At Thu, 16 Dec 2004 13:17:02 -0800,
Stephen Warren wrote:
> 
> I'm attempting to get audio up and running on a new system with the
> HD-Audio/ALC880.
> 
> Part of the connectivity is:
> 
> Line-2 pins are output, and connect to both the internal speakers on the
> laptop, and a headphone jack. If I configure NID 0x1b as output, and NID
> 0x13 to select the "front" input source, then program mixer NID 0x0c
> correctly, and send data to DAC 0x02, then I hear audio on the speakers
> (or headphones) just fine. Alsamixer correctly controls the volume.
> 
> However, there are also 3 audio jacks on the back of the system -
> namely, front, surround and center/lfe. These are allegedly connected to
> the front, surround and center/lfe pins on the ALC880 (the side-surround
> pins are unused).
> 
> Now, I know DAC 0x02 and mixer 0x0c are working fine, since they affect
> the internal speakers when routed through 0x13/0x1b.
> 
> However, if I program pin NID 0x14 (front out) just like I programmed
> pin NID 0x1b (line2), then I can't get anything to come out. As an
> experiment, I tried every possible programming of pin NID 0x14, and
> nothing works!
> 
> The same experiment using DAC 0x03/0x04 and associated output pins
> doesn't work either. I've sat running speakertest, plugging both
> headphones and regular PC speakers into all the audio jacks, and no
> luck.
> 
> (I've also tested all the other DACs and mixers by routing them out the
> line2 output, so I know the problem only lies with the other output pin
> configuration, or beyond somewhere on the PCB)
> 
> Any ideas of anything else I might try to debug this?

I tested the test board here (which has 3-stack + front-panel) and
found that the surround doesn't work here, too.
It's because the wrong initialization sequence when switched to the
6-channel mode.  After fixing it, the surround seems working well with
6-ch mode.  The patch is below (already committed to CVS).

I guess the wrong pin control assignment or the unmuted amp volumes in
somewhere in your case, too.


Takashi