linux-kernel - Re: [PATCH] ALSA: hda/realtek: Enable audio line out on ASUS D640SA

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Date:   Tue, 03 Apr 2018 11:04:31 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     Jian-Hong Pan <jian-hong@...lessm.com>
Cc:     alsa-devel@...a-project.org, Hui Wang <hui.wang@...onical.com>,
        linux@...lessm.com, Jaroslav Kysela <perex@...ex.cz>,
        Kailang Yang <kailang@...ltek.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ALSA: hda/realtek: Enable audio line out on ASUS D640SA

On Tue, 03 Apr 2018 10:43:02 +0200,
Jian-Hong Pan wrote:
> 
> 2018-04-02 19:29 GMT+08:00 Takashi Iwai <tiwai@...e.de>:
> >
> > On Mon, 02 Apr 2018 09:33:13 +0200,
> > Jian-Hong Pan wrote:
> > >
> > > This ASUS D640SA desktop whose mother board is D640MB has
> > > - two jacks which are a headphone and a mic on the front panel,
> > > - three jacks which are a mic, a line out and a line in on the rear panel
> > > - one internal speaker.
> > >
> > > If I plug a headphone to the front headphone jack, there will be sound
> > > through the headphone jack, and no sound through the internal speaker.
> > > If I unplug the headphone from the the headphone jack, there will be
> > > sound through the internal speaker.  And always no sound through rear
> > > line out, when I plug a headphone or an externel speaker to the rear
> > > line out jack.
> > >
> > > Besides, I had checked and toggled the Auto-Mute Mode in alsamixer, but
> > > the rear line out still was not working.  Then I checked the sound
> > > settings in GUI, and found there was no "Line Out" could be chosen, only
> > > the "Headphones" and "HDMI/DisplayPort".
> > > However, system does know that there is an "Intel PCH Line Out".
> > >
> > > [   10.089082] snd_hda_codec_realtek hdaudioC0D0: autoconfig for
> > > ALC887-VD: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:line
> > > [   10.089083] snd_hda_codec_realtek hdaudioC0D0:    speaker_outs=1
> > > (0x1a/0x0/0x0/0x0/0x0)
> > > [   10.089084] snd_hda_codec_realtek hdaudioC0D0:    hp_outs=1
> > > (0x1b/0x0/0x0/0x0/0x0)
> > > [   10.089085] snd_hda_codec_realtek hdaudioC0D0:    mono: mono_out=0x0
> > > [   10.089086] snd_hda_codec_realtek hdaudioC0D0:    inputs:
> > > [   10.089087] snd_hda_codec_realtek hdaudioC0D0:      Rear Mic=0x18
> > > [   10.089088] snd_hda_codec_realtek hdaudioC0D0:      Front Mic=0x19
> > > [   10.089089] snd_hda_codec_realtek hdaudioC0D0:      Line=0x15
> > > [   10.104387] input: HDA Intel PCH Rear Mic as
> > > /devices/pci0000:00/0000:00:1f.3/sound/card0/input9
> > > [   10.104416] input: HDA Intel PCH Front Mic as
> > > /devices/pci0000:00/0000:00:1f.3/sound/card0/input10
> > > [   10.104441] input: HDA Intel PCH Line as
> > > /devices/pci0000:00/0000:00:1f.3/sound/card0/input11
> > > [   10.104467] input: HDA Intel PCH Line Out as
> > > /devices/pci0000:00/0000:00:1f.3/sound/card0/input12
> > > [   10.104494] input: HDA Intel PCH Front Headphone as
> > > /devices/pci0000:00/0000:00:1f.3/sound/card0/input13
> > >
> > > Consequently, I checked the pin widgets' default configuration values:
> > > - Node 0x14 [Pin Complex] wcaps 0x40058d: Stereo Amp-Out
> > >     Pin Default 0x01014010: [Jack] Line Out at Ext Rear
> > >
> > > - Node 0x1b [Pin Complex] wcaps 0x40058f: Stereo Amp-In Amp-Out
> > >     Pin Default 0x02214030: [Jack] HP Out at Ext Front
> > >
> > > Because the headphone jack (Node ID:0x1b) locates on the desktop's front
> > > panel, not rear panel, I change the headphone jack's configuration from
> > > primary chassis to separate chassis.  So, the configuration value of
> > > Node ID:0x1b should be 0x22214030.
> >
> > This is OK, but...
> >
> > > Additionally, I toggle the Auto-Mute Mode of Realtek codecs to “Speaker
> > > Only” which makes signal outputs through line out jack when the "Line
> > > Out" is chosen in the sound settings.
> >
> > ... this is a matter of taste, and I don't think it good to set a
> > different default from others.  You can change it once and save it via
> > alsactl.
> 
> The default state of Auto-Mute Mode of Realtek codec on this machine is
> "Line Out + Speaker".
> This disallows to output audio signal through the line out jack, even I already
> choose the "Line Out" as the audio output device in the sound settings.
> It means there is no way to use the line out jack in "Line Out + Speaker" state
> of Auto-Mute Mode on this machine.

It's a setup issue by PA, and it's not specific to this device at
all.  If PA wants the independent output, it can change to auto-mute
off by itself.

> To enhance the user experience, especially the new one who first uses Linux,
> changing this machine's Auto-Mute Mode to "Speaker Only" state, which allows
> to output the audio signal through the line out jack, will be the better choice.
> 
> By the way, if the "Headphones" is chosen as the audio output device in the
> sound settings, the audio signal will not output through the line out jack
> automatically.
> 
> Therefore, I think this part of the quirk is still needed on this machine.

Again, this isn't about the machine configuration, but a generic PA
problem.  Fixing it in a device-specific fixup is no right way.


thanks,

Takashi