From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752693Ab0ILLVI (ORCPT ); Sun, 12 Sep 2010 07:21:08 -0400 Received: from silver.sucs.swan.ac.uk ([137.44.10.1]:42124 "EHLO silver.sucs.swan.ac.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751682Ab0ILLVH (ORCPT ); Sun, 12 Sep 2010 07:21:07 -0400 Date: Sun, 12 Sep 2010 12:21:05 +0100 From: Sitsofe Wheeler To: Peter Zijlstra Cc: linux-kernel@vger.kernel.org, Ingo Molnar , Corentin Chary , fweisbec Subject: Re: EeePC 900 reboots/hangs when using using perf -a -f -g Message-ID: <20100912112105.GA28420@sucs.org> References: <20100912102854.GA7359@sucs.org> <1284289027.2251.95.camel@laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1284289027.2251.95.camel@laptop> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Sep 12, 2010 at 12:57:07PM +0200, Peter Zijlstra wrote: > > Bisect it? .35 shows the same issue (although I didn't recompile my perf binary). I don't know if this is a regression - it might always have been there... > Does .35 work? If so, you could try it with the .35 version of > eeepc-laptop driver to see if its something specific to that driver, or > if its something we did to the stack unwinding code. > > Most curious issue.. It certainly is weird. When the machine reboots I notice that the backlight is not at its normal level as if something was dimming the display (perhaps X turns off the backlight and turns off the display when powersaving these days?). As the only backlight driver on my system is in eeepc-laptop that's why I removed it. -- Sitsofe | http://sucs.org/~sits/