linux-kernel - Re: BUG: soft lockup during suspend

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Message-ID: <46000CB2.9090700@redhat.com>
Date:	Tue, 20 Mar 2007 12:32:50 -0400
From:	Chuck Ebbert <cebbert@...hat.com>
To:	Takashi Iwai <tiwai@...e.de>
CC:	Pavel Machek <pavel@....cz>,
	kernel list <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: BUG: soft lockup during suspend

Takashi Iwai wrote:
> At Tue, 20 Mar 2007 17:08:48 +0100,
> I wrote:
>> At Tue, 20 Mar 2007 12:05:07 -0400,
>> Chuck Ebbert wrote:
>>> Takashi Iwai wrote:
>>>> X60/T60 is known to be often broken regarding the communication
>>>> between the controller and the codec chip.  When this kind of thing
>>>> happens, the driver tries to switch to a single-shot I/O without using
>>>> ring-buffers and IRQs, and even in such a mode, the communication gets
>>>> broken.  FWIW, it doesn't happen on other machines with HD-audio, so
>>>> it's fairly specific to X60/T60.  No idea why.
>>> What about Acer Aspire 5102?
>>>
>>> http://lkml.org/lkml/2006/12/3/9
>> This is a different problem.
>> A known workaround is to provide probe_mask=1 module option.
> 
> BTW, does this happen on the latest linus git tree?  (rc4 may work,
> though)
> 
> If yes, could you try the patch below?
> 

I can't easily test 2.6.21-rc, but "probe_mask=1" works on 2.6.20.4, which spews
errors without that. Should I try your patch on 2.6.20?
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