linux-kernel - Re: [regression] Sound not transferred to docking station after resume from StR

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Date:	Mon, 19 Apr 2010 09:47:37 +0200
From:	Takashi Iwai <tiwai@...e.de>
To:	Frans Pop <elendil@...net.nl>
Cc:	linux-kernel@...r.kernel.org, linux-pm@...ts.linux-foundation.org,
	alsa-devel@...a-project.org
Subject: Re: [regression] Sound not transferred to docking station after resume from StR

At Sat, 17 Apr 2010 11:06:22 +0200,
Frans Pop wrote:
> 
> On Friday 16 April 2010, Frans Pop wrote:
> > Scenario:
> > - suspend laptop while *un*docked, i.e. with laptop speakers in use
> > - dock laptop
> > - resume
> >
> > With 2.6.33 and earlier the sound would always come from the external
> > speakers connected to the docking station. But with 2.6.34-rc4 I get
> > sound still coming from the laptop's internal speakers, which is not
> > correct.
> 
> The problem is slightly different than I thought. Turns out *both* the
> internal (laptop) and external (docking station) speakers are active after
> the resume. So the problem is that the internal speakers are not switched off.
> 
> I have traced this to an ALSA merge: 524df55725217. Unfortunately I get
> boot failures when I try to bisect down into that merge.
> 
> Here's the bisect log:
> # bad: [0d0fb0f9c5fddef4a10242fe3337f00f528a3099] Linux 2.6.34-rc4
> # good: [724e6d3fe8003c3f60bf404bf22e4e331327c596] Linux 2.6.33-rc8
> git bisect start 'v2.6.34-rc4' 'v2.6.33-rc8'
> # bad: [94468080220162f74dc6ce5c3e95e5fec8022902]
>   Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6
> git bisect bad 94468080220162f74dc6ce5c3e95e5fec8022902
> # bad: [524df55725217b13d5a232fb5badb5846418ea0e] Merge branch 'for-linus'
>   of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
> git bisect bad 524df55725217b13d5a232fb5badb5846418ea0e
> # good: [0f4533979473a456a8adb3869365e12c7a99cf65]
>   Merge branches 'futexes-for-linus', 'irq-core-for-linus' and
>   'bkl-drivers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
> git bisect good 0f4533979473a456a8adb3869365e12c7a99cf65

Could you give alsa-info.sh on your machine, preferably before/after
suspend on both working (2.6.33) and non-working kernels?

Also, you can try to copy sound/pci/hda/patch_analog.c from 2.6.33 to
2.6.34 to check whether it works.  There shouldn't be many changes in
that file.


thanks,

Takashi
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