Bug#606482: no headphone output on ASUS M4A785T-D motherboard

[Jonathan Nieder <jrnieder@gmail.com>]

Sergio Gelato wrote:

> The problem turned out to be due to an inappropriate BIOS configuration
> setting. The "Front Panel Select" setting needed (for my specific case)
> to be set to "AC97" instead of "HD Audio". Found thanks to some comments in
> https://bugtrack.alsa-project.org/alsa-bug/view.php?id=5309
> (especially note 23449).
>
> No kernel changes needed.

That sounds like a workaround rather than a fix.

If it is possible to get the headphone jack working in HDA mode as well
as AC97, we would like to do that, to avoid new users having to learn what
BIOS knob to change.  Based on the upstream report you mentioned it
seems that 2.6.39 might fix this; could you try 3.2.y from wheezy or
unstable?  (The only packages needed from outside squeeze for this
test are the kernel image itself, linux-base, and initramfs-tools.)

Thanks for the update,
Jonathan