From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753814Ab3BCV3a (ORCPT ); Sun, 3 Feb 2013 16:29:30 -0500 Received: from mail-ee0-f50.google.com ([74.125.83.50]:38667 "EHLO mail-ee0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753670Ab3BCV32 (ORCPT ); Sun, 3 Feb 2013 16:29:28 -0500 Message-ID: <510ED6B4.6000405@suse.cz> Date: Sun, 03 Feb 2013 22:29:24 +0100 From: Jiri Slaby User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:18.0) Gecko/20121129 Thunderbird/18.0 MIME-Version: 1.0 To: Borislav Petkov , "Rafael J. Wysocki" , Bjorn Helgaas , x86@kernel.org, lkml , Konstantin Khlebnikov Subject: Re: Uhhuh. NMI received for unknown reason 2c on CPU 0. References: <20130129202848.GE25415@pd.tnic> <5109A8F1.9040707@suse.cz> <5109B11C.2010400@suse.cz> <5170962.qHnbnlVDfx@vostro.rjw.lan> <20130131070926.GC4926@pd.tnic> <510A2B1C.1060108@suse.cz> <20130131131805.GG4926@pd.tnic> In-Reply-To: <20130131131805.GG4926@pd.tnic> X-Enigmail-Version: 1.5 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 01/31/2013 02:18 PM, Borislav Petkov wrote: > On Thu, Jan 31, 2013 at 09:28:12AM +0100, Jiri Slaby wrote: >> And, does it happen if you switch all of them but NMI wtd in there? > > No, but something else happens. Here's the whole dance: > > 1. Switch all tunables except "NMI watchdog should be turned off" to "Good" > 2. suspend to disk > 3. resume... all good > 4. switch "NMI watchdog should be turned off" to "Good" > 5. suspend to disk > 6. resume... all good > 7. start powertop, toggle "Wireless Power Saving for interface wlan0" twice. > I.e., "Good" -> "Bad"; "Bad" -> "Good". > > -> Boom! Unknown reason NMI. It happened right during the toggle because > it appeared in the framebuffer console (no X) right during me toggling > this. Right, for me too. Even if I disable nmi watchdog in both the boot and image kernel, the NMI eventually occurs (dunno what's the trigger now though). Given the above I'm thinking about switching that intel wi-fi card to ath9k which I have at hand and retest... -- js suse labs