Re: BUG: soft lockup during suspend

[Takashi Iwai <tiwai@suse.de>]

At Tue, 20 Mar 2007 12:32:50 -0400,
Chuck Ebbert wrote:
> 
> 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?

Well, 2.6.21 has really tons of fixes/improvements regarding HD-audio,
so I basically prefer tests on 2.6.21.  But, at least, the patch can
be applied on the top of Greg's latest 2.6.20.x patches...


Takashi