linux-kernel - Re: hda-intel: azx_get_response timeout, switching to polling mode: last cmd=0x01db0000

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Message-ID: <s5hhazm6alb.wl%tiwai@suse.de>
Date:	Mon, 23 Jan 2012 10:18:24 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Petr Baudis <pasky@....cz>
Cc:	Jonathan Nieder <jrnieder@...il.com>, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org
Subject: Re: hda-intel: azx_get_response timeout, switching to polling mode: last cmd=0x01db0000

At Sat, 21 Jan 2012 10:16:02 +0100,
Petr Baudis wrote:
> 
>   Hi!
> 
> On Thu, Dec 29, 2011 at 12:21:05AM -0600, Jonathan Nieder wrote:
> > Petr Baudis wrote[1]:
> > 
> > > Version: 3.1.5-1
> > [...]
> > > this bug is twofold - I'm not sure which of the two problems is the real
> > > culprit of the issue I'm seeing, and if it's worth fixing both or just
> > > either one. It boils down to sometimes choppy playback and mainly
> > > applications getting stuck on some audio operations.
> > [...]
> > > This did not use to happen at least back around 2.6.32.
> > [...]
> > > I'd be willing to do some bisecting if people believe it would make
> > > sense.
> > 
> > I don't see any relevant newer fixes, but could you test the for-next
> > branch from [2] anyway?  Output from the alsa-info.sh script[3] would
> > also be useful.
> 
> I'm really sorry for taking so long - this is still an issue for me, but
> contrary to my expectations, I was not able to reboot this machine yet
> and it might take some more time (weeks...) before that's convenient.
> I will try the then-current kernel and for-next branch then.
> 
> The output from the alsa-info.sh script is at:
> 
> 	http://www.alsa-project.org/db/?f=184928832b33b23c68d17460604b9a37af0fac4b

Thanks.  Switching to the polling mode is really harmless.
So, basically you can ignore these messages.  I can change it only as a
debug message.

OTOH, if the switching to single_cmd mode happens, this is a serious
problem.  But, as far as I see in alsa-info.sh output, it didn't
happen.


Takashi
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