kernel-packages team mailing list archive

[Hui Wang <hui.wang@xxxxxxxxxxxxx>]

Hi Kailang,

Thanks for providing the patch, and we tested the patch, it fixed the 
problem.

Regards,
Hui.

On 04/23/2015 03:18 PM, Kailang wrote:
> Fix Dell ALC256 headphone Mic recording issue.
> Default is pcbeep path for 0x1a input.
>
>> -----Original Message-----
>> From: Takashi Iwai [mailto:tiwai@xxxxxxx]
>> Sent: Tuesday, April 21, 2015 6:03 PM
>> To: David Henningsson
>> Cc: tiwai@xxxxxxx; Kailang; hui.wang@xxxxxxxxxxxxx;
>> 1446517@xxxxxxxxxxxxxxxxxx; stable@xxxxxxxxxxxxxxx
>> Subject: Re: [PATCH] ALSA: hda - fix "num_steps = 0" error on ALC256
>>
>> At Tue, 21 Apr 2015 10:48:46 +0200,
>> David Henningsson wrote:
>>> The ALC256 does not have a mixer nid at 0x0b, and there's
>> no loopback
>>> path (the output pins are directly connected to the DACs).
>>>
>>> This commit fixes an "num_steps = 0 for NID=0xb (ctl = Beep
>> Playback Volume)"
>>> error (and as a result, problems with amixer/alsamixer).
>>>
>>> If there's pcbeep functionality, it certainly isn't controlled by
>>> setting an amp on 0x0b, so disable beep functionality (at
>> least for now).
>>> Cc: stable@xxxxxxxxxxxxxxx
>>> BugLink:
>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1446517
>>> Signed-off-by: David Henningsson <david.henningsson@xxxxxxxxxxxxx>
>> Applied, thanks.
>>
>>
>> Takashi
>>
>>> ---
>>>   sound/pci/hda/patch_realtek.c | 5 +++--
>>>   1 file changed, 3 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/sound/pci/hda/patch_realtek.c
>>> b/sound/pci/hda/patch_realtek.c index 231d0e4..03975d03 100644
>>> --- a/sound/pci/hda/patch_realtek.c
>>> +++ b/sound/pci/hda/patch_realtek.c
>>> @@ -5664,6 +5664,7 @@ static int patch_alc269(struct
>> hda_codec *codec)
>>>   		break;
>>>   	case 0x10ec0256:
>>>   		spec->codec_variant = ALC269_TYPE_ALC256;
>>> +		spec->gen.mixer_nid = 0; /* ALC256 does not
>> have any loopback mixer
>>> +path */
>>>   		break;
>>>   	}
>>>   
>>> @@ -5677,8 +5678,8 @@ static int patch_alc269(struct
>> hda_codec *codec)
>>>   	if (err < 0)
>>>   		goto error;
>>>   
>>> -	if (!spec->gen.no_analog && spec->gen.beep_nid)
>>> -		set_beep_amp(spec, 0x0b, 0x04, HDA_INPUT);
>>> +	if (!spec->gen.no_analog && spec->gen.beep_nid &&
>> spec->gen.mixer_nid)
>>> +		set_beep_amp(spec, spec->gen.mixer_nid, 0x04,
>> HDA_INPUT);
>>>   
>>>   	codec->patch_ops = alc_patch_ops;
>>>   	codec->patch_ops.stream_pm = snd_hda_gen_stream_pm;
>>> --
>>> 1.9.1
>>>
>> ------Please consider the environment before printing this e-mail.

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https://bugs.launchpad.net/bugs/1446517

Title:
  "num_steps = 0" error on ALC256

Status in linux package in Ubuntu:
  Fix Committed

Bug description:
  This bug is used for tracking, please do not triage.

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