linux-kernel - Re: 2.6.18: hda_intel: azx_get_response timeout, switching to single

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Date:	Tue, 26 Sep 2006 08:37:20 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Pavel Machek <pavel@...e.cz>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	alsa-devel@...a-project.org, Andrew Morton <akpm@...l.org>
Subject: Re: 2.6.18: hda_intel: azx_get_response timeout, switching to
 single_cmd mode...

On Tue, 26 Sep 2006 12:16:33 +0200 Takashi Iwai wrote:

> At Mon, 25 Sep 2006 12:58:08 -0700,
> Jeremy Fitzhardinge wrote:
> > 
> > I have a ThinkPad X60 which uses the Intel 82801G HDA audio chip.  This 
> > used to work for me, but lately (sometime during 2.6.18-rcX series) it 
> > stopped working - programs trying to use it tend to just block forever 
> > waiting for /dev/dsp.
> > 
> > The only obvious symptom is:
> > 
> >     hda_intel: azx_get_response timeout, switching to single_cmd mode...
> > 
> > appearing in the kernel log when booting.
> > 
> 
> There is no big change relevant to TP X60 during 2.6.18rc, so I don't
> think it's a regression in the hd-audio driver code.
> 
> > Details attached.  The dmesg output is for the FC6 distro kernel 
> > 2.6.18-1.2689.fc6PAE, but I see the same symptoms with 2.6.18-mm1.
> 
> You must see difference with mm1 (suppose that mm1 already includes
> the latest ALSA patches).  When the CORB/RIRB interrupt gets broken,
> the driver first switches to poling mode, then single_cmd mode as
> fallback.
> 
> Also, try disable_msi=1 option for mm1.  MSI seems broken on some
> systems.

is that "pci=nomsi" ?

---
~Randy
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