[alsa-devel] Dell AIO speaker pop noise

[Takashi Iwai]

On Tue, 16 Apr 2019 10:59:37 +0200,
Kailang wrote:
> 
> 
> 
> > -----Original Message-----
> > From: Takashi Iwai <tiwai at suse.de>
> > Sent: Tuesday, April 16, 2019 4:22 PM
> > To: Jaroslav Kysela <perex at perex.cz>
> > Cc: Kailang <kailang at realtek.com>; hwang4 <hui.wang at canonical.com>;
> > (alsa-devel at alsa-project.org) <alsa-devel at alsa-project.org>
> > Subject: Re: [alsa-devel] Dell AIO speaker pop noise
> > 
> > On Tue, 16 Apr 2019 10:01:31 +0200,
> > Jaroslav Kysela wrote:
> > >
> > > Dne 16. 04. 19 v 9:30 Kailang napsal(a):
> > > > Hi Takashi,
> > > >
> > > > Issue 1: The noise keeps occurring via speaker when Headset is plugged in.
> > > > Issue 2: The humming noise is occuring when switching to sound of
> > settings.
> > > > 	 The noise will be stopped when switching to other options of settings.
> > > > Issue 3: The popping noise occurred for one second when plugged in and
> > removed the headset.
> > > >
> > > > This patch will solve this three issues.
> > >
> > > Hi,
> > >
> > >   could you explain, why the power-save function causes this
> > > behaviour? Can we do something else than turning off the power-save
> > > codec settings to avoid such noises? I have this question because it's really
> > easy to disable something, but I feel that the culprit of the noises might be just
> > the wrong codec settings. I guess that you have probably full documentation
> > for the codec and probably for the hardware, so it might be nice to find the
> > real culprit.
> > 
> > Note that power_save_node=0 doesn't mean that the whole power saving is
> > disabled.  It disables the fine-grained power saving, i.e. powering down the
> > unused widget nodes.
> > 
> > If so, I wonder whether this might be about the default pin-shutup behavior.  I
> > improved the click noise problem on my Dell desktop by disabling the pin
> > shutup.  See commit c0ca5eced222.
> > Kailang, Hui, did you try to add the chain to ALC269_FIXUP_NO_SHUTUP?
> > 
> This noise was not happen on poweroff.

The pin shutup change helped at the resume click noise in my case.

> AIO use external AMP. So, it will be need to have a reference voltage via codec.
> So, Pin-ctls was not be 0. I apply option spec->gen.suppress_auto_mute = 1 to avoid that. 

If a specific widget must not enter D3, you can filter out by setting
with power filter.  An example is found in patch_sigmatel.c
stac_vref_led_power_filter() which avoids D3 on AFG node for keeping
mute LED working.


Takashi

> Internal SPK PIN also don't enter to D3. But I find it just only happen on ALC274 family codecs.
> ALC274 pin enter to D3. Pin-ctls also be 0. So, power_save_node=0 will let PIN to D0.
> 
> power_save = 0 it also could solve issue.
> 
> 
> 
> > 
> > thanks,
> > 
> > Takashi
> > 
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>