[alsa-devel] 3.8-rc1 patch_cirrus 4.0 regression...
tiwai at suse.de
Tue Feb 5 18:40:53 CET 2013
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 at suse.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 ; let me know if you'd like 3.8-rc6
> > pure.
> > 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.
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