[alsa-devel] Headphone output problems with HP ProDesk 600 G1 (Realtek ALC221)

Robert Hancock hancockrwd at gmail.com
Tue Feb 18 17:31:45 CET 2014

On Tue, Feb 18, 2014 at 10:22 AM, Robert Hancock <hancockrwd at gmail.com> wrote:
> On Mon, Feb 17, 2014 at 8:13 PM, Raymond Yau
> <superquad.vortex2 at gmail.com> wrote:
>>>> I have a HP ProDesk 600 G1 machine which seems to have some strange
>> behavior with the front headphone jack(s) running under Fedora 20
>> (running 3.13.2 kernel):
>>>> This machine has two front jacks: a headphone jack and a
>> microphone/headphone jack. When the headphones are plugged into the
>> headphone jack, there's usually no change in the sound outputs list in
>> the Sound control panel. The audio (mostly) works if the audio output
>> device is set to Analog Output, but sometimes spuriously changes back
>> to Speakers and the headphone output stops working (I suspect maybe
>> from a spurious jack-sensing event, though I'm not certain). More
>> confusingly, a couple of times I have gotten it into the state
>> (through various fiddling with jacks and playing in the Sound control
>> panel) where plugging into this jack is detected and causes the
>> Headphone output to be selected in the control panel. I haven't been
>> able to figure out consistently what causes this to happen.
>>>> If the headphone is plugged into the microphone/headphone jack, then
>> the control panel consistently switches to the Headphone output and
>> consistently switches back the way it was when it's unplugged.
>> However, there's no actual audio output coming out of that jack. (From
>> some of the HP manuals, it sounds like with the Windows driver, when
>> you plug into this jack, it's supposed to pop up a prompt asking you
>> whether you want to use it as a microphone or headphones.)
>>>> The other strange thing is that intermittently, on the headphone jack
>> you'll start getting a bunch of loud static (clicking noises) and any
>> actual audio playback becomes very faint and distorted.
>>>> I'm guessing perhaps something isn't being initialized/setup properly
>> in the codec, causing this kind of erratic behavior. The alsa-info
>> output is uploaded at:
>> http://www.alsa-project.org/db/?f=594e837b7af07ffbe3473cf807465bc81a587880
>>>> I tried using hda-analyzer but it fails on this machine with:
>>>> ValueError: wrong proc file format (unknown dig1 bit 'KAE')
>>>> Any suggestions for things to try to debug this?
>> Node 0x14 [Pin Complex] wcaps 0x40018d: Stereo Amp-Out
>>   Control: name="PCM Playback Switch", index=0, device=0
>>     ControlAmp: chs=3, dir=Out, idx=0, ofs=0
>>   Control: name="Line Out Jack", index=0, device=0
>>   Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
>>   Amp-Out vals:  [0x00 0x00]
>>   Pincap 0x00010014: OUT EAPD Detect
>>   EAPD 0x2: EAPD
>>   Pin Default 0x01014020: [Jack] Line Out at Ext Rear
>>     Conn = 1/8, Color = Green
>>     DefAssociation = 0x2, Sequence = 0x0
>> it is a driver bug which assign PCM playback Switch to Line Out Jack
>> try the patch  https://bugzilla.kernel.org/attachment.cgi?id=124971
> With this patch, I get no audio output at all (totally silent on all
> ports). Even with playing around with alsamixer and muting/unmuting
> outputs I could not get anything coming out.

I've created a Bugzilla report here:


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