linux-kernel - Re: 3.8-rc1 patch_cirrus 4.0 regression...

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Message-ID: <s5h4nhp7wij.wl%tiwai@suse.de>
Date:	Wed, 06 Feb 2013 08:05:08 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Daniel J Blueman <daniel@...ra.org>
Cc:	David Henningsson <david.henningsson@...onical.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	alsa-devel@...a-project.org
Subject: Re: 3.8-rc1 patch_cirrus 4.0 regression...

At Wed, 6 Feb 2013 08:47:41 +0800,
Daniel J Blueman wrote:
> 
> On 6 February 2013 01:40, Takashi Iwai <tiwai@...e.de> wrote:
> > At Tue, 05 Feb 2013 17:34:15 +0100,
> > Takashi Iwai wrote:
> >>
> >> At Wed, 6 Feb 2013 00:29:54 +0800,
> >> Daniel J Blueman wrote:
> >> >
> >> > On 6 February 2013 00:16, Takashi Iwai <tiwai@...e.de> wrote:
> >> > > At Wed, 6 Feb 2013 00:10:30 +0800,
> >> > > Daniel J Blueman wrote:
> >> > >>
> >> > >> Hi Takashi,
> >> > >>
> >> > >> The v3.8-rc kernels have regressed from v3.7 with the quad-speaker
> >> > >> arrangement on my Macbook Pro 10,1 - only the higher-frequency
> >> > >> speakers work despite the front and rear channels being exposed in the
> >> > >> mixer.
> >> > >
> >> > > Interesting.  So you have a machine with 4.0 built-in speaker instead
> >> > > of 2.1?  Then we need to add a device-specific flag for it.  Currently
> >> > > the driver assumes 2.1 system blindly because majority of machines
> >> > > have that.
> >> > >
> >> > > FWIW, the codec parser code has been totally rewritten for 3.9, so any
> >> > > patch to 3.8 won't be applied to 3.9 (and vice versa)...
> >> > >
> >> > > Could you give alsa-info.sh output on 3.8 kernel?  Then I'll try to
> >> > > cook it for 3.9 (and maybe backport to 3.8).
> >> >
> >> > Here's the output from the current alsa-info.sh on 3.8-rc6 with the
> >> > two cited patches reverted [1]; let me know if you'd like 3.8-rc6
> >> > pure.
> >>
> >> Thanks.
> >>
> >> > The sound is pretty impressive for a laptop when the low-frequecy
> >> > speakers are enabled.
> >>
> >> Which program are you using for testing the surrounds?
> >> I'm interested in it because the commit you reverted is basically
> >> providing only an additional information for the channel map, and it
> >> doesn't change anything else.  It implies that some applications are
> >> really referring to the chmap info.
> >
> > Or, it might be that the mixer value is simply not set correct.
> >
> > To be sure, could you try again 3.8-rc6 without reversing patches,
> > adjust "Speaker" and "Bass Speaker" volumes properly, and retest?
> > If it still doesn't work, please take alsa-info.sh snapshot at this
> > state for comparing with the previous result.
> 
> My apologies! We do now have "Bass Speaker" which affects both bass
> speakers. It was always being restored to level 0 and works when set
> up.

OK, good to know.

> There is a "Subwoofer" slider in addition to "Balance" and "Fade" in
> the GNOME mixer UI which is greyed out; presumably this is intended as
> the same mixer control?

I have no idea about GNOME stuff... David, do you know of this?


Takashi
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