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Date:	12 Apr 2011 23:19:04 -0400
From:	"George Spelvin" <linux@...izon.com>
To:	dzickus@...hat.com, gorcunov@...il.com,
	linux-kernel@...r.kernel.org
Cc:	a.p.zijlstra@...llo.nl, airlied@...il.com, eranian@...gle.com,
	linux@...izon.com, ming.m.lin@...el.com
Subject: Re: Uhhuh. NMI received for unknown reason 2d on CPU 0.

This problem which I thought was fixed by commit 7d44ec193d, appears to be
still very much present in 2.6.39-rc3:

Apr 12 22:16:00 horizon kernel: Uhhuh. NMI received for unknown reason 3d on CPU 0.
Apr 12 22:16:00 horizon kernel: Do you have a strange power saving mode enabled?
Apr 12 22:16:00 horizon kernel: Dazed and confused, but trying to continue
Apr 12 22:17:22 horizon kernel: Uhhuh. NMI received for unknown reason 2d on CPU 0.
Apr 12 22:17:22 horizon kernel: Do you have a strange power saving mode enabled?
Apr 12 22:17:22 horizon kernel: Dazed and confused, but trying to continue
Apr 12 22:21:17 horizon kernel: Uhhuh. NMI received for unknown reason 2d on CPU 0.
Apr 12 22:21:17 horizon kernel: Do you have a strange power saving mode enabled?
Apr 12 22:21:17 horizon kernel: Dazed and confused, but trying to continue
Apr 12 22:25:02 horizon kernel: Uhhuh. NMI received for unknown reason 2d on CPU 0.
Apr 12 22:25:02 horizon kernel: Do you have a strange power saving mode enabled?
Apr 12 22:25:02 horizon kernel: Dazed and confused, but trying to continue
Apr 12 22:28:24 horizon kernel: Uhhuh. NMI received for unknown reason 3d on CPU 0.
Apr 12 22:28:24 horizon kernel: Do you have a strange power saving mode enabled?
Apr 12 22:28:24 horizon kernel: Dazed and confused, but trying to continue
Apr 12 22:31:28 horizon kernel: Uhhuh. NMI received for unknown reason 2d on CPU 0.
Apr 12 22:31:28 horizon kernel: Do you have a strange power saving mode enabled?
Apr 12 22:31:28 horizon kernel: Dazed and confused, but trying to continue
Apr 12 22:34:20 horizon kernel: Uhhuh. NMI received for unknown reason 3d on CPU 0.
Apr 12 22:34:20 horizon kernel: Do you have a strange power saving mode enabled?
Apr 12 22:34:20 horizon kernel: Dazed and confused, but trying to continue
Apr 12 22:37:01 horizon kernel: Uhhuh. NMI received for unknown reason 3d on CPU 0.
Apr 12 22:37:01 horizon kernel: Do you have a strange power saving mode enabled?
Apr 12 22:37:01 horizon kernel: Dazed and confused, but trying to continue

Same system as before: 1.6 GHz P4, ASUS P4B266LA, Intel 845 chipset.

I suspect commit 242214f9c1 wasn't quite as effective as hoped.
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