Well
As Roseannadanna used to say "there's always something".
I can get no sound from the front panel audio connector shown on p2-37
of the manual.
I have tried both ports 1L&R and 2L&R
Any clues?
Thanks
Bruce
There are two configurations for the AAFP header. A so-called
AC-97 configuration, and the Azalia configuration. Judging by
your terminology, you have the BIOS "Front Panel Support Type"
set to Azalia.
When the header is in Azalia mode, notice it has some port sense
pins. As far as I know, these are contact closures, but your
average computer case probably doesn't have those closures yet.
The AC-97 mode is a simple output mode, and maybe it'll work better
for you. For some reason, the Bline signals are missing on the
header, and if you have a couple of wires left over from your
computer case, don't sweat it. I think, with so many ports on the
Azalia chip, there is no need to loop the audio back to the
motherboard, and that is why, with the AAFP header, set in
AC-97 mode, you should only need three wires (Lineout_R,
Lineout_L, and AGND), to get a working set of headphones.
For your reference, try this document which has been updated to
take into account Azalia HDaudio configurations:
http://www.formfactors.org/developer\specs\A2928604.pdf
Figure 2 on page 20, shows an AC-97 header config. The computer
case jacks used, had five pins, and have the two contact closures
to route a pair of stereo signals back to the motherboard.
Figure 6 on page 25, shows the Azalia HDaudio header. Notice
how the audio jack on the computer case end is different. The
jack still has five pins, but it only has one contact closure,
and the contact pair is isolated from the audio signals
themselves. Few computer cases will be using that jack type.
Looking at the wiring there, I bet if the BIOS was set to
Azalia mode, the "Presence#" pin is grounded (meaning an Azalia
computer case is plugged in), and then you connect "sense_send"
pin 7 signal, to both "sense1_return" pin 6 and "sense2_return"
pin 10, the motherboard sound chip would interpret the signals
seen on the two sense_return pins as meaning you have plugged
something into both ports. That should cause the sound chip
control panel to pop up, and you can then set the ports to
whatever you want (mic or headphone).
That solution stinks a bit, because it will always look like
two devices are plugged in all the time, even when you aren't
using them. I only presented the description in the previous
paragraph, to show how it works. And, using some SPST switches,
to fake the Azalia jack contacts, would also be an ugly
kludge (flip switches, to use mic or headphones).
BTW: Are the port settings being remembered across reboots,
when using the new drivers ?
HTH,
Paul
