[pulseaudio-discuss] Lost audio on headphones on Fedora 9

[Andre Costa]

Hi,

quick update: it's definitely a kernel bug, headphone works with kernel
2.6.26.6-79. I filed it as bug #472317:

https://bugzilla.redhat.com/show_bug.cgi?id=472317

Regards,

Andre

On Wed, Nov 19, 2008 at 12:26, Andre Costa <blueser at gmail.com> wrote:

> Hi Colin,
>
> On Wed, Nov 19, 2008 at 11:16, Colin Guthrie <gmane at colin.guthr.ie> wrote:
>
>> Andre Costa wrote:
>> > Any help will be appreciated. Let me know what kind of additional info I
>> > should provide.
>>
>> It's unlikely that any of the controls in pulse itself will help as it
>> only exposes a very minimal subset of lower level alsa controls.
>>
>> Chances are the problem is at the alsa level, more than likely a control
>> toggle or an independent headphone volume slider that is set to zero or
>> something.
>>
>> To access alsa configuration, you will need to run the alsa mixer on the
>> hardware directly rather than on the "default" alsa device which is
>> probably setup to direct things to pulse (and thus will only expose
>> afore mentioned minimal controls).
>>
>> To do this in a console you can run: alsamixer -c 0
>>
>> Or you can use a GUI alsa mixer like gnome-alsamixer which will only
>> look at hardware devices.
>>
>> HTHs and you find a solution fiddling about with a control there.
>>
>
> Thks for the tip, alsamixer -c 0 indeed shows all the options. "Headphone"
> is there, and even though it doesn't have volume levels to play with, it is
> unmuted and should be playing allright AFAIK.
>
> However, I guessed you pointed me the right direction: ALSA. Searching on
> Google I found this:
>
> http://lkml.org/lkml/2008/2/11/412
>
> The symptoms seem to be exactly the same. This thread took place on
> Feb/2008, but I could be experiencing a regression bug, maybe...
>
> This also seemed promising:
>
> http://www.mail-archive.com/alsa-user@lists.sourceforge.net/msg23600.html
>
> But increasing number of channels to 6 didn't help...
>
> More info on the model of my card:
>
> 00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio
> Controller (rev 02)
>
> (couldn't find any specific option for it on
> http://fedoraproject.org/wiki/KernelHdaDriverOptions -- ALC888 isn't even
> mentioned yet)
>
> Any more ideas? I guess I'll try ALSA forums anyway and, depending on the
> result, file a bug report on Fedora Bugzilla...
>
> Thks a lot,
>
> Andre
>
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