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Date:	Thu, 03 Jan 2013 14:39:42 +0100
From:	Vincent Blut <vincent.debian@...e.fr>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [3.6.9 -> 3.7.1 regression] sound: snd_hda_intel codec probing
 issue?

Le jeudi 03 janvier 2013 à 10:19 +0100, Takashi Iwai a écrit :
> At Fri, 28 Dec 2012 15:25:40 +0100,
> Vincent Blut wrote:
> > 
> > Hi,
> > 
> > Since I updated to Linux 3.7.1, listening to some audio/video bits
> > frequently cause the following:
> > 
> > [ 7896.166946] hda-intel: azx_get_response timeout, switching to polling
> > mode: last cmd=0x020c0000
> > [ 7897.173444] hda-intel: No response from codec, disabling MSI: last
> > cmd=0x020c0000
> > [ 7898.179932] hda_intel: azx_get_response timeout, switching to
> > single_cmd mode: last cmd=0x020c0000
> > [ 7898.179983] hda-codec: out of range cmd 0:0:20:400:fffff7ff
> > [ 9445.034371] plugin-containe[5873]: segfault at 7f44bb95e639 ip
> > 00007f44e454bca0 sp 00007f44c91165f8 error 4 in
> > libc-2.13.so[7f44e442c000+180000]
> > 
> > It seems to be a codec probing failure (?). This is really fatal because
> > the sound become very choppy and can't recover until I reboot.
> > I'll try to play with 'probe_mask' kernel parameter to see if I can
> > narrow the correct codec slots!
> > 
> > By the way I can't reproduce this on 3.6.9, so is there something that
> > changed in this area in 3.7.1?
> 
> If it's new in 3.7, this could be a regression by runtime D3.
> Try to pass power_save_controller=0 option to snd-hda-intel module
> (or change it via sysfs dynamically).
> 
> 
> thanks,
> 
> Takashi

Hi,

That makes sense, however I can't reliably reproduce this so I'll report
back later.

Thanks and happy new year!

Vincent

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