Re: 3.19-rc1 regression bisected No sound on Dell Latitude d430

[Hans de Bruin]

On 01/12/2015 07:52 AM, Takashi Iwai wrote:
> At Sun, 11 Jan 2015 22:44:37 +0100,
> Hans de Bruin wrote:
> > On 01/11/2015 04:45 PM, Takashi Iwai wrote:
> > > At Sun, 11 Jan 2015 13:21:34 +0100,
> > > Hans de Bruin wrote:
> > > > This commit:
> > > >
> > > > commit 3abb4f4d0e7aaad0d12004b5057f4486a688752b
> > > > Author: David Henningsson <david.henningsson@xxxxxxxxxxxxx>
> > > > Date:   Thu Oct 16 15:33:46 2014 +0200
> > > >
> > > >        ALSA: hda - Use "Line Out" name instead of "PCM" when there are
> > > > other outputs
> > > >
> > > >        In case there are speakers or headphones as well, anything that only
> > > >        covers the line out should not be labelled "PCM". Let's name it
> > > >        "Line Out" instead for clarity.
> > > >
> > > >        Signed-off-by: David Henningsson <david.henningsson@xxxxxxxxxxxxx>
> > > >        Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
> > > >
> > > > breaks the sound on my dell laptop.
> > >
> > > What sound?  From the speaker, the headphone or the dock output?
> >
> > The speaker. I have not checked the other exits
> >
> > > Are you using PulseAudio?
> >
> > No
> >
> > > What if you adjust/unmute the volume
> > > (likely "Line Out") manually?
> >
> > running 3.18 alsamixer show these options:
> >
> > Master
> > PCM
> > Mic Boost
> > Auto Mute mode
> >
> > PCM affects the volume of the speaker.
> >
> > running 3.19-rc1 alsamixer show these options:
> >
> > Master
> > PCM
> > Line Out
> > Mic Boost
> > Auto Mute mode
> >
> > Line out now controls the vole of the speaker (this 'new' channel had
> > volume 0 so did not hear anything). Changing PCM has no effect.
>
> OK, then this is the expected change.  It was a bug that we assigned
> "PCM" only for the speaker and now it's corrected.  Now "PCM" is still
> present but this was created by alsa-lib softvol pcm, and has nothing
> to do directly with the driver itself.  This control is used only when
> you play the stream with the dedicated setup, i.e. via "default" or
> "sysdefault" device name, not via "hw", "plughw", etc.

Thanks for the explanation and the quick response. The issue can be closed.

--
Hans



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