snd_hda : sometimes sound sometimes not

David Demelier demelier.david at gmail.com
Mon May 16 18:23:49 UTC 2011


On 16/05/2011 18:32, Clifton Royston wrote:
> On Mon, May 16, 2011 at 06:22:16PM +0200, David Demelier wrote:
>> 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?
>
> At least do a binary search via svn revision on the regression:
>
>    That is, look up the current revision of stable you are on, look up
> the revision of the 8.2-RELEASE branch point, and update to halfway in
> between.  If it has the problem, go halfway between that and the
> 8.2-RELEASE, if it doesn't, go halfway between that and your current
> revision, and so on.
>
>    This approach will cut the number of updates and builds you need to
> try to the logarithm of the number of distinct revisions.  My
> impression is that it's so obvious to some people they never mention
> it and to others it's a complete revelation.
>
>    -- Clifton
>

Hi,

I downloaded RELENG_8 src/ via cvs because I usually used csup instead. 
I absolutely have no idea how to find the middle between 8.2-RELEASE and 
my 8-STABLE revision though :-(

Cheers,

-- 
David Demelier


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