linux-kernel - Re: 2.6.29 regression: left audio channel broken after resume from suspend with Intel HDA

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Date:	Fri, 08 May 2009 06:42:04 +1000
From:	Nigel Cunningham <ncunningham-lkml@...a.org.au>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Tino Keitel <tino.keitel@....de>, linux-kernel@...r.kernel.org,
	alsa-devel@...a-project.org
Subject: Re: 2.6.29 regression: left audio channel broken after resume from
 suspend with Intel HDA

Hi.

On Thu, 2009-05-07 at 14:16 +0200, Takashi Iwai wrote:
> At Thu, 07 May 2009 21:54:40 +1000,
> Nigel Cunningham wrote:
> > 
> > Hi.
> > 
> > On Thu, 2009-05-07 at 12:45 +0200, Takashi Iwai wrote:
> > > The problem is that BIOS on your machine sets this pin both for
> > > input and output.  Since it's set as input, the driver respects
> > > the BIOS setup and skips to override.
> > 
> > 'scuse the ignorance, but this makes me ask: Are pins logically
> > unrelated to jacks?
> 
> Yes, they are.
> 
> > I have a Dell M1530, and it has some jacks that can
> > work as either inputs or outputs. Under M$, when I plug something in, a
> > dialog box pops up asking me whether I connected a mic, line in or an
> > output jack (I forget the details). Sounds like Tino's problem is what
> > I'd expect from my BIOS. But I'm probably completely ignorant :)
> 
> The problem there is that the BIOS sets the current pin direction for
> both input and output, but you can't play and record at the same time
> on a jack.  It's not about the capability. 
> 
> BIOS is supposed to set all the pins properly ready for use, but it's
> not so on Mac.

Thanks! :)

Nigel

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