linux-kernel - Re: "APIC error on CPU1: 00(40)" during resume (was: Regression from 2.6.26: Hibernation (possibly suspend) broken on Toshiba R500)

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Date:	Wed, 10 Dec 2008 07:51:35 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Frans Pop <elendil@...net.nl>
cc:	Ingo Molnar <mingo@...e.hu>, lenb@...nel.org,
	"Rafael J. Wysocki" <rjw@...k.pl>, Greg KH <greg@...ah.com>,
	jbarnes@...tuousgeek.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	tiwai@...e.de, Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: "APIC error on CPU1: 00(40)" during resume (was: Regression from
 2.6.26: Hibernation (possibly suspend) broken on Toshiba R500)

On Wed, 10 Dec 2008, Frans Pop wrote:
>
> Anybody interested in persuing this issue?

> > The third thing that worries me is the _very_ early occurrence of
> >
> > 	ACPI: Waking up from system sleep state S3
> > 	APIC error on CPU1: 00(40)
> > 	ACPI: EC: non-query interrupt received, switching to interrupt mode

Well, the "too early" part is fixed with the PCI resume changes in -next, 
and googling for "APIC error on CPU1: 00(40)" shows that it's actually 
pretty common. Which is sad, but makes it somewhat less scary.

The fact that it happens at resume for you (and not randomly) does imply 
that we perhaps don't have a wonderful APIC wakeup sequence and are doing 
something slightly wrong. But it likely isn't a big deal.

Is that message new? If it is, maybe you can pinpoint roughly when it 
started happening, and we could try guess which change triggered it.

		Linus
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