Date: Wed, 05 Sep 2007 22:27:35 +0200
Message-ID: <s5hfy1srh6w.wl%tiwai@suse.de>
From: Takashi Iwai <tiwai@suse.de>
To: Valdis.Kletnieks@vt.edu
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org
Subject: Re: 2.6.23-rc4-mm1 - git-alsa.patch breaks audio on Dell Latitude D820
In-Reply-To: <s5hir6orhxz.wl%tiwai@suse.de>
References: <20070831215822.26e1432b.akpm@linux-foundation.org>
	<4658.1189021594@turing-police.cc.vt.edu>
	<s5hir6orhxz.wl%tiwai@suse.de>
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At Wed, 05 Sep 2007 22:11:20 +0200,
I wrote:
> 
> At Wed, 05 Sep 2007 15:46:34 -0400,
> Valdis.Kletnieks@vt.edu wrote:
> > 
> > On Fri, 31 Aug 2007 21:58:22 PDT, Andrew Morton said: 
> > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.23-rc4/2.6.23-rc4-mm1/
> > 
> > git-alsa.patch breaks audio on my laptop, worked fine in -rc3-mm1.  Almost
> > certainly bustification in the Intel HDA rewrite.
> > 
> > Symptoms:  alsamixer finds the chipset, can adjust the volumes and mute/unmute,
> > and /usr/bin/play is able to write a .wav to the ALSA device without complaint.
> > However, no sound actually comes out.  Very "lights are on but nobody is home".
> > 
> > Dell Latitude D820, lspci reports:
> > 
> > 00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
> > and alsamixer reports finding a "SigmaTel STAC9200"
> > 
> > % grep HDA_ .config
> > CONFIG_SND_HDA_INTEL=y
> > # CONFIG_SND_HDA_HWDEP is not set
> > CONFIG_SND_HDA_CODEC_REALTEK=y
> > CONFIG_SND_HDA_CODEC_ANALOG=y
> > CONFIG_SND_HDA_CODEC_SIGMATEL=y
> > # CONFIG_SND_HDA_CODEC_VIA is not set
> > # CONFIG_SND_HDA_CODEC_ATIHDMI is not set
> > # CONFIG_SND_HDA_CODEC_CONEXANT is not set
> > # CONFIG_SND_HDA_CODEC_CMEDIA is not set
> > # CONFIG_SND_HDA_CODEC_SI3054 is not set
> > CONFIG_SND_HDA_GENERIC=y
> > # CONFIG_SND_HDA_POWER_SAVE is not set
> > 
> > dmesg under -rc4-mm1:
> > Advanced Linux Sound Architecture Driver Version 1.0.14 (Fri Jul 20 09:12:58 2007 UTC).
> > ACPI: PCI Interrupt 0000:00:1b.0[A] -> GSI 21 (level, low) -> IRQ 21
> > hda_intel: position_fix set to 1 for device 1028:01cc
> > ALSA device list:
> >   #0: HDA Intel at 0xefffc000 irq 506
> > 
> > dmesg under -rc3-mm1:
> > 
> > Advanced Linux Sound Architecture Driver Version 1.0.14 (Fri Jul 20 09:12:58 2007 UTC).
> > ACPI: PCI Interrupt 0000:00:1b.0[A] -> GSI 21 (level, low) -> IRQ 21
> > hda_intel: position_fix set to 1 for device 1028:01cc
> > ALSA device list:
> >   #0: HDA Intel at 0xefffc000 irq 506
> > 
> > (Yes, they look the same to me, too...)
> > 
> > I'd provide more info, if I had a clue what else to add...
> 
> First, check /proc/asound/card0/codec#* whether STAC9200 is identified
> properly?  If yes, check the mixer contents (at best, run
> "alsactl -f somefile store"), see whether "Master Playback Volume" is
> raised, "Master Playback Switch" unmuted, "Front..." raised/unmuted,
> and "PCM ..." raised/unmuted, etc.
> 
> If this still doesn't work, try to give model=ref option to
> snd-hda-intel. 

BTW, there are 10 different models to test for Dell with STAC9200
(dell-d2[1-3] and dell-m2[1-7], see
Documentation/sound/alsa/ALSA-Configuration.txt), so I recommend to
build it as a module so that you can save the boot time :)


Takashi
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