From owner-freebsd-current@FreeBSD.ORG Fri Feb 22 13:17:51 2008 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 761A816A400 for ; Fri, 22 Feb 2008 13:17:51 +0000 (UTC) (envelope-from alex.kovalenko@verizon.net) Received: from vms046pub.verizon.net (vms046pub.verizon.net [206.46.252.46]) by mx1.freebsd.org (Postfix) with ESMTP id 5CDD513C457 for ; Fri, 22 Feb 2008 13:17:51 +0000 (UTC) (envelope-from alex.kovalenko@verizon.net) Received: from [10.0.3.231] ([70.111.176.151]) by vms046.mailsrvcs.net (Sun Java System Messaging Server 6.2-6.01 (built Apr 3 2006)) with ESMTPA id <0JWN009LP697A8V1@vms046.mailsrvcs.net> for freebsd-current@freebsd.org; Fri, 22 Feb 2008 07:17:33 -0600 (CST) Date: Fri, 22 Feb 2008 08:17:24 -0500 From: "Alexandre \"Sunny\" Kovalenko" In-reply-to: <86zlttqmc9.fsf@ds4.des.no> To: Dag-Erling =?ISO-8859-1?Q?Sm=F8rgrav?= Message-id: <1203686245.63435.12.camel@RabbitsDen> MIME-version: 1.0 X-Mailer: Evolution 2.12.3 FreeBSD GNOME Team Port Content-type: text/plain; charset=utf-8 Content-transfer-encoding: 8BIT References: <20080219104532.0dc2b565@chaos.nox> <47BDB92C.9050808@d80.iso100.no> <20080222113646.2dbb9ec1@chaos.nox> <86zlttqmc9.fsf@ds4.des.no> Cc: svein-listmail@d80.iso100.no, freebsd-current , Mikael Ikivesi Subject: Re: 2 core dumps X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 Feb 2008 13:17:51 -0000 On Fri, 2008-02-22 at 12:09 +0100, Dag-Erling Smørgrav wrote: > Mikael Ikivesi writes: > > I have checked for overheating as it was my first quess but the answer > > is no. And these dumps happened without powerd. I only manually enable > > 1800Mhz sometimes if I need extra speed. It seems to be highest > > sustainable speed for this machine. Powerd heats this laptop too much > > without manually setting _PSV value to much lower. And the result would > > be the same 1800Mhz. > > Your laptop overheats when running at its rated frequency? That's your > answer. Hardware error. Most likely incorrect application of heat > transfer compound between the CPU and the heatsink, or blocked or > defective fans. If your CPU has overheated even once, you can't trust > it any more, unless it has an automatic cutoff like Core and Core 2. If "overheated" in this context means "initiated critical shutdown" neither statement needs to be true. For instance, there is the patch from Umemoto-san floating around acpi@ that enables use of passive cooling for the thermal zones other that tz0, and there is at least one model of laptop that I know of, which uses tz1 for its CPU. This means that FreeBSD *will not* handle passive cooling on such laptop and it might reach _CRT and shut itself down. Also, some manufacturers put _PSV dangerously close to _CRT, assuming that OS will take over in time, which might or might not happen in the real life. However, if "overheated" means "discolored and deformed plastic parts", you are absolutely right. > > DES -- Alexandre "Sunny" Kovalenko (Олександр Коваленко)