linux-kernel - Re: Uhhuh. NMI received for unknown reason 2c on CPU 0.

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Message-ID: <20130203211514.GF5844@pd.tnic>
Date:	Sun, 3 Feb 2013 22:15:14 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	"Rafael J. Wysocki" <rjw@...k.pl>, Jiri Slaby <jslaby@...e.cz>,
	Bjorn Helgaas <bhelgaas@...gle.com>, x86@...nel.org,
	lkml <linux-kernel@...r.kernel.org>,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>
Subject: Re: Uhhuh. NMI received for unknown reason 2c on CPU 0.

On Sun, Feb 03, 2013 at 10:06:45PM +0100, Borislav Petkov wrote:
> On Sun, Feb 03, 2013 at 09:58:57PM +0100, Borislav Petkov wrote:
> > and it seemed to me that when the eth cable is plugged in, it would
> > suspend and resume fine. When I then boot, unplug the cable, set all
> > tunables to "Good", suspend to disk and resume, no NMI message. When I
> > plug the cable back, only *then* the message triggered.
> > 
> > I need to play with this a bit more to get a better sense of when
> > exactly it happens.
> 
> Ok, not really.
> 
> It is not influenced by the cable being plugged - it happens when I plug
> in the cable or simply shortly after resume, without the cable.

Ok, just did 10 s2ram cycles back-to-back - no issue whatsoever, no
matter when I (un-)plug the cable. Changed the suspend script to

echo "disk" > /sys/power/state

and did an 11th suspend-resume run. It triggered right after resuming
from disk. So I'd guess the image kernel might be the required condition
for the triggering of the issue.

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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