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Date:	Thu, 20 Sep 2007 16:47:32 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Jaroslav Kysela <perex@...e.cz>,
	Takashi Iwai <tiwai@...e.de>,
	linux-usb-devel@...ts.sourceforge.net,
	Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
Subject: Re: 2.6.23-rc6-mm1: failure to boot on HP nx6325, no sound when booted, USB-related WARNING

On Thursday, 20 September 2007 15:53, Thomas Gleixner wrote:
> On Thu, 2007-09-20 at 16:12 +0200, Rafael J. Wysocki wrote:
> > > Vs. the suspend / resume wreckage of rc6-mm1 / rc6-hrt2: 
> > 
> > ie. the one on the Vaio (I assume).
> > 
> > > I'm still fishing in rather dark water. Depending on the added
> > > instrumentation points the problem mutates up to the point where it
> > > vanishes completely. The hang, which requires key strokes again, happens
> > > consistently at the same place:
> > > 
> > > The notifier call in kernel/cpu.c::_cpu_up()
> > > 
> > >        ret = __raw_notifier_call_chain(&cpu_chain, CPU_UP_PREPARE | mod, hcpu,
> > >                                                         -1, &nr_calls);
> > > 
> > > does not return, but _all_ registered notifiers are called and reach
> > > their return statement. This reminds me on:
> > > 
> > > http://lkml.org/lkml/2007/5/9/46
> > > 
> > > Sigh. I have no clue where to dig further.
> > 
> > Well, the above may affect SMP systems, but the Vaio is UP.  Hmm?
> 
> My jinxed VAIO variant is SMP, but it looks like the same mysterious
> error.

Hm.  Have you tried

# echo test > /sys/power/disk
# echo disk > /sys/power/state

(should suspend devices and disable the nonboot CPUs, wait for 5 sec. and
restore everything)?

Greetings,
Rafael
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