LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Takashi Iwai <tiwai@suse.de>
To: Matej Laitl <strohel@gmail.com>
Cc: alsa-devel <alsa-devel@alsa-project.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [ALSA] HDA: no sound in headphone-out caused by commit f889fa91ad47e (2.6.25-rc1 regression)
Date: Wed, 13 Feb 2008 12:01:37 +0100	[thread overview]
Message-ID: <s5hd4r1t90u.wl%tiwai@suse.de> (raw)
In-Reply-To: <200802121924.35232.strohel@gmail.com>

At Tue, 12 Feb 2008 19:24:35 +0100,
Matej Laitl wrote:
> 
> > > So there are now 3 vol controls that affect both speakers and headphones:
> > > * Master (which appeared somewhere between 2.6.24 and .25-rc1), when set
> > > to zero, the sound is still audible in speakers and headphones
> >
> > This must be the behavior of the codec chip...  Did "Front" volume 0
> > mute in the earlier version?  If not, it actually doesn't mute with
> > the lowest volume.  Use the master switch to mute.
> >
> > Anyway, attach the alsa-info.sh output at the moment Master volume is
> > zero.
> 
> No, setting Master and/or Front channel to 0% did not mute audio in any 
> version I used.
> 
> I'm now listening to music with Master=0% and Front=0%, the sound is at well 
> audible volume. Pastebin for this configuraion is here:
> http://pastebin.ca/901459

Thanks.  The amp values in the codec are indeed set to zero, so this
is the minimal volume level, but the codec chip apparently doesn't
mute the sound.

> However I don't consider it a problem, it's mutable by PCM and HP/Speaker 
> switches. Funny thing is that resulting volume of those 3 setting is equal:
> * Master=0, Front=0
> * Master=100%, Front=0
> * Master=0, Front=100%
> But when both set to let's say 50, changing one of these audibly affects 
> resulting volume.

It's because the master volume is implemented virtually to bind
several mixer volumes together.  The codec chip has no corresponding
functionality.


Takashi

  parent reply	other threads:[~2008-02-13 11:01 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-11 20:58 Matej Laitl
2008-02-12 10:13 ` Takashi Iwai
2008-02-12 10:50   ` Matej Laitl
2008-02-12 11:02     ` Takashi Iwai
2008-02-12 11:34       ` Takashi Iwai
2008-02-12 12:06         ` Matej Laitl
2008-02-12 14:02           ` Takashi Iwai
2008-02-12 14:13             ` Takashi Iwai
2008-02-12 15:27               ` Matej Laitl
2008-02-12 17:14                 ` Takashi Iwai
2008-02-12 18:24                   ` Matej Laitl
2008-02-12 22:57                     ` Matej Laitl
2008-02-13 10:59                       ` Takashi Iwai
2008-02-13 12:05                         ` Matej Laitl
2008-02-13 13:06                           ` Takashi Iwai
2008-02-13 15:00                             ` Matej Laitl
2008-02-13 15:25                               ` Takashi Iwai
2008-02-13 11:01                     ` Takashi Iwai [this message]
2008-02-12 11:36       ` Matej Laitl

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=s5hd4r1t90u.wl%tiwai@suse.de \
    --to=tiwai@suse.de \
    --cc=alsa-devel@alsa-project.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=strohel@gmail.com \
    --subject='Re: [ALSA] HDA: no sound in headphone-out caused by commit f889fa91ad47e (2.6.25-rc1 regression)' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).