From owner-freebsd-stable@FreeBSD.ORG Fri Jul 2 23:35:18 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DA2F1106564A for ; Fri, 2 Jul 2010 23:35:18 +0000 (UTC) (envelope-from jhellenthal@gmail.com) Received: from mail-iw0-f182.google.com (mail-iw0-f182.google.com [209.85.214.182]) by mx1.freebsd.org (Postfix) with ESMTP id 973198FC0C for ; Fri, 2 Jul 2010 23:35:18 +0000 (UTC) Received: by iwn35 with SMTP id 35so1801287iwn.13 for ; Fri, 02 Jul 2010 16:35:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:sender:message-id:date:from :user-agent:mime-version:to:cc:subject:references:in-reply-to :x-enigmail-version:openpgp:content-type:content-transfer-encoding; bh=IfODIUjx3YvjaqGKUBKbXidQisKvsHqk1TTG6Zj0dig=; b=irMtWc97M/MFaDBetjADj12b12UsNz4I3SCfF6aL3e+s/pHLmR39XhhgKjdzZTG5Lp 5ZBtFfomqrq948tjEYaKKrm3yygcNSwqyo9fo20YFn3OBsWsRh1WHa6Pc9GAQzqDIXVX u1R6MyJnh1N6G5SYrNmQpDOsolnLDtnEc2OBE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:x-enigmail-version:openpgp:content-type :content-transfer-encoding; b=eO89NpyQ487vOSI/qsOxMCwbCp8+jg4e55hyDTM6vPzEfUnJ4LA1Tspv/3pRPoVuFD +KbTDHQMD9dC9kXWrt3IP2J0uYw0BymgWQWbJMglG2Z92Y5VqLTo+s39yr9uH7i5OrNf PQ4wqllil3RZw2i1aiJupj1gh1TCyqbiO6Iek= Received: by 10.231.60.7 with SMTP id n7mr1521025ibh.60.1278113718223; Fri, 02 Jul 2010 16:35:18 -0700 (PDT) Received: from centel.dataix.local (adsl-99-181-128-180.dsl.klmzmi.sbcglobal.net [99.181.128.180]) by mx.google.com with ESMTPS id x6sm5257811ibb.5.2010.07.02.16.35.16 (version=SSLv3 cipher=RC4-MD5); Fri, 02 Jul 2010 16:35:16 -0700 (PDT) Sender: "J. Hellenthal" Message-ID: <4C2E77B2.4080907@dataix.net> Date: Fri, 02 Jul 2010 19:35:14 -0400 From: jhell User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.9.1.10) Gecko/20100626 Thunderbird MIME-Version: 1.0 To: "C. P. Ghost" References: In-Reply-To: X-Enigmail-Version: 1.0.1 OpenPGP: id=89D8547E Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-stable@freebsd.org, "William D. Colburn \(Schlake\)" Subject: Re: My kernel panics suck X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 02 Jul 2010 23:35:19 -0000 On 07/02/2010 16:29, C. P. Ghost wrote: > On Fri, Jul 2, 2010 at 9:18 PM, William D. Colburn (Schlake) > wrote: >> I got my new 8-stable system up, and now I just have recurrent disk >> controller failures. The machine can't stay more than about ten >> minutes before it panics into a hung kernel, or simple reboots. >> Unfortunately, I know the root cause of the panics. If my computer is >> sitting on the table, then the kernel doesn't panic. If the computer >> is sitting on the desk, then it panics like mad. The table is wooden, >> the desk is metal. Of course, I'm also changing power too. On the >> table, I use a wall outlet, while on the desk I use my Smart UPS. >> Unfortunately, you can't really help me with this. I'm just writing >> in out of the hope that I'll get some sympathy for this problem. > > Yuck...! If you have an electrical insulation problem, and your desk > is metal, I'd _really_ urge you to replace your hardware completely, > or have it properly insulated by a professional electrician. An electric > shock could cause real pain() and panic(). ;-) > > But seriously, if that's the only reason for the panics, it's a pretty > strong hint that you have an electrical problem: when ICs are > underpowered, they tend to behave erratically. > >> -- Schlake > > -cpghost. > Adding to this, though I find it unlikely but worth mentioning but you could be grounding out to a already charged surface through a screw in the case (laptop/desktop), check the bottom and cover up anything you find with black electrical tape and try again. Another route would be to grab a multimeter and test the metal table for a positive ? source. If that metal table also happens to be screwed down to the floor then take all the screws out as one maybe more could be running across some weird current. Regards, -- +-+-+-+-+-+ |j|h|e|l|l| +-+-+-+-+-+