snd_hda : sometimes sound sometimes not

[David Demelier]

On 12/05/2011 08:47, David Demelier wrote:
> Hello,
>
> I don't know if there is a lot of changes in the snd_hda driver in the
> -STABLE branch but since I upgraded to it sometimes I have sound and
> sometimes not.
>
> The mixer are exactly the same when these event occurs. This happened
> this morning. After booting I do not have any sound. I rebooted and
> suddenly I've got sound again...
>
> I only tweak snd_hda(4) for a pin sense on the front panel (it has no
> sound neither)
>
> So I added in /boot/devices.hints :
> hint.hdac.1.cad0.nid27.config="as=1 seq=15"
>
> And there's the both dmesg ok.txt when sound is here and not.txt when
> there isn't as you can see there is no difference related to the hda
> driver.
>
> http://markand.malikania.fr/ok.txt
> http://markand.malikania.fr/nok.txt
>
> I'm guessing something. My laptop has a mute shortcut, if I press it at
> the BIOS stage I will not have sound neither thus is it possible that my
> chipset is muted from anything?
>
> Cheers,
>

I will try to downgrade 8.2-RELEASE and then update the kernel code to 
more specific version to see where the regression happens.

How can I try this step by step ? Should I try to svn / cvs day per day?

Cheers,

-- 
David Demelier