From owner-freebsd-questions@FreeBSD.ORG Thu Feb 14 05:10:27 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id AC40916A421 for ; Thu, 14 Feb 2008 05:10:27 +0000 (UTC) (envelope-from nate@nathansouer.com) Received: from hume.nathansouer.com (nathansouer.com [70.58.238.237]) by mx1.freebsd.org (Postfix) with ESMTP id 4A54B13C44B for ; Thu, 14 Feb 2008 05:10:26 +0000 (UTC) (envelope-from nate@nathansouer.com) Received: from www.nathansouer.com (localhost [IPv6:::1]) by hume.nathansouer.com (8.13.8/8.13.8) with ESMTP id m1E4kI25046687 for ; Wed, 13 Feb 2008 22:46:18 -0600 (CST) (envelope-from nate@nathansouer.com) Received: from 209.240.66.157 (SquirrelMail authenticated user nate) by www.nathansouer.com with HTTP; Wed, 13 Feb 2008 22:46:18 -0600 (CST) Message-ID: <48002.209.240.66.157.1202964378.squirrel@www.nathansouer.com> In-Reply-To: References: <38768.209.240.66.157.1202851338.squirrel@www.nathansouer.com> <47B21924.5030702@bsdforen.de> <63459.70.58.238.235.1202884507.squirrel@www.nathansouer.com> Date: Wed, 13 Feb 2008 22:46:18 -0600 (CST) From: "Nathan Alan Souer" To: freebsd-questions@freebsd.org User-Agent: SquirrelMail/1.4.8 MIME-Version: 1.0 Content-Type: text/plain;charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Priority: 3 (Normal) Importance: Normal X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,NO_RELAYS autolearn=ham version=3.1.6 X-Spam-Checker-Version: SpamAssassin 3.1.6 (2006-10-03) on hume.nathansouer.com Subject: Re: Kernel Panic with heavy disk i/o while running on battery X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Feb 2008 05:10:27 -0000 The machine passed the memory test while on battery fine. however, while on battery the checksum failed with i/o errors, it did complete the checksum normally while on AC. I think my next step will be to try and disable acpi, and to try and reproduce the error again. i suppose it could be an issue with a flakey controller, but I havent seen any related issues while I was running windows or ubuntu on the machine. if it isn't an issue with power management, I guess I'll learn some kernel debugging. > Nathan Alan Souer wrote: >>> Nathan Alan Souer wrote: >>>> In advance, I appreciate any help that anyone has to offer. When my >>>> laptop >>>> is running on battery and there is heavy i/o on the disk The machine >>>> kernel panics and reboots. I have updated my base system to current >>>> (7_releng) just a couple days ago in an effort to resolve this issue, >>>> to >>>> no change. >>>> >>> I would start with a memory test program. I have seen similar things >>> happen >>> with broken memory. > >> the machine passes a full pass of memtest86+ > > Just checking - you did the test in the same conditions (on battery > power) as the crash? > > I have a suggestion that's a bit silly but it might help - can you boot > of a live/fixit CD and calculate a hash of the drive's content, on and > off AC power, to see if it's a hardware problem with the controller or > the drive? > > (dd if=/dev/drive bs=1m | md5) > >