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

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Message-ID: <CAMVG2ssBaD=W3mAecKjCH8+G-HiVpHqQ5iSoyA4n9_3Mgz=VWQ@mail.gmail.com>
Date:	Wed, 6 Feb 2013 08:47:41 +0800
From:	Daniel J Blueman <daniel@...ra.org>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	alsa-devel@...a-project.org
Subject: Re: 3.8-rc1 patch_cirrus 4.0 regression...

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.

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?

Dan
-- 
Daniel J Blueman
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