[alsa-devel] [Regression] With the new 2.6.33 when I plug headphones, the speaker doen't get off anymore

giggzounet giggzounet at gmail.com
Mon Mar 1 14:44:51 CET 2010

Takashi Iwai a écrit :
> At Sun, 28 Feb 2010 15:29:25 +0100,
> giggz wrote:
>> giggz a écrit :
>>> giggzounet a écrit :
>>>> Hi,
>>>> I have installed debian stable lenny + backports on an eeepc 1201n. With
>>>> the 2.6.30 or 2.6.32 from lenny-backport I don't have problem with sound
>>>> : when I plug the headphones, speakers get off.
>>>> I have tested with 2.6.33 and when I plug headphones, speakers don't get
>>>> off anymore. so I have sound in headphones and speakers.
>>>> 22:42 giggz at baal ~ % cat /proc/asound/card0/codec#* | grep Codec
>>>> Codec: Realtek ALC269
>>>> Codec: Nvidia MCP7A HDMI
>>>> I attach the output of alsa-info with the and the 2.6.33 (I'm
>>>> in a Uni Campus and it's quite difficult to have internet on a external
>>>> laptop...so I attach them at this mail and I don't upload them on pastbin).
>>>> I have opened a bug on the kernel bugzilla (bug 15399). Should I provide
>>>> anything more ?
>>> Following the advice of Paul Menzel I did a "diff" of the sources of the
>>> kernel and of the 2.6.33. In patch_realtek.c, we see that there
>>> is an new snd_hda_jack_detect funtion with 2 arguments. I have noticed
>>> that the second argument is "normaly" the second argument of
>>> snd_hda_codec_read. In the alc269_speaker_automute function there is
>>> this new snd_hda_jack_detect function, but the second argument is "nid".
>>> But in the old alc269_speaker_automute of the the second
>>> argument of snd_hda_codec_read is 0x15. So I think there is perhaps a
>>> bug here...But I hesitate to modify the source...so I'm waiting the
>>> anwser of the dev.
>>> --- patch_realtek.c	2010-02-27 14:58:06.000000000 +0100
>>> +++ patch_realtek_modif.c	2010-02-27 14:58:54.000000000 +0100
>>> @@ -13381,7 +13381,7 @@
>>>  	unsigned int present;
>>>  	unsigned char bits;
>>> -	present = snd_hda_jack_detect(codec, nid);
>>> +	present = snd_hda_jack_detect(codec, 0x15);
>>>  	bits = present ? AMP_IN_MUTE(0) : 0;
>>>  	snd_hda_codec_amp_stereo(codec, 0x0c, HDA_INPUT, 0,
>>>  				AMP_IN_MUTE(0), bits);
>> I tested it. And with this modif in the kernel, after recompilation and
>> reboot, my problem is headphones and speaker is gone.
> It implies that the setup of the headphone pin is wrong.  This doesn't
> mean a bug of the driver, though.  It might have uncovered the BIOS
> bug.

ok. I don't have any knowledge in C or in bios...so you're problably
right :)

but it seems strange that for all the new line with snd_hda_jack_detect
the second argument is always the second argument of snd_hda_codec_read
except for the alc269.

> Could you provide alsa-info.sh without your patch to check the setup?

In attachment of the first post on alsa-devel or on the kernel bugzilla
http://bugzilla.kernel.org/show_bug.cgi?id=15399, there are the output
of alsa-info.sh with the (no problem) and the output of
alsa-info.sh with the 2.6.33 without any patch (problem occurs).

Do you need another outputs ?

Thx for your driver!
Best regards,

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