linux-kernel - Re: Regression from 2.6.26: Hibernation (possibly suspend) broken on Toshiba R500 (bisected)

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Date:	Fri, 30 Jan 2009 05:35:37 +0100
From:	Frans Pop <elendil@...net.nl>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Greg KH <greg@...ah.com>,
	jbarnes@...tuousgeek.org, lenb@...nel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	tiwai@...e.de, Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: Regression from 2.6.26: Hibernation (possibly suspend) broken on Toshiba R500 (bisected)

On Thursday 29 January 2009, Ingo Molnar wrote:
> > Quick revival of this old thread with good news.
> > The "APIC error on CPU1" message is now gone!
>
> that was an old mystery!
>
> So enabling interrupts too early (possibly before the lapic, the hpet
> or both are initialized properly?) can generate an APIC error message?

I'm not really sure what change has caused the error to disappear. I could 
do some investigation, but fear we may have had too many changes (and 
broken suspend between them) to accurately pinpoint it.

> > With current git head I get:
> >    ACPI: Waking up from system sleep state S3
> >    ACPI: EC: non-query interrupt received, switching to interrupt
> > mode
>
> i started getting those messages too - but earlier in the cycle, during
> one of the ACPI merges i think.

I get the same message during a normal boot and in roughly the same place: 
shortly after CPU1 is enabled and CPUs attaching to sched-domains. So I'm 
happy with Alexey's comment that this is normal.
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