From owner-freebsd-current@FreeBSD.ORG Wed Jun 11 02:29:02 2003 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 439C237B401 for ; Wed, 11 Jun 2003 02:29:02 -0700 (PDT) Received: from stork.mail.pas.earthlink.net (stork.mail.pas.earthlink.net [207.217.120.188]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4C9F743FBD for ; Wed, 11 Jun 2003 02:29:01 -0700 (PDT) (envelope-from tlambert2@mindspring.com) Received: from user-38lc0s4.dialup.mindspring.com ([209.86.3.132] helo=mindspring.com) by stork.mail.pas.earthlink.net with asmtp (SSLv3:RC4-MD5:128) (Exim 3.33 #1) id 19Q1tF-0004JU-00; Wed, 11 Jun 2003 02:27:34 -0700 Message-ID: <3EE6F54A.127D9187@mindspring.com> Date: Wed, 11 Jun 2003 02:24:26 -0700 From: Terry Lambert X-Mailer: Mozilla 4.79 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Antony T Curtis References: <200306110847.38319.antony@abacus.co.uk> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-ELNK-Trace: b1a02af9316fbb217a47c185c03b154d40683398e744b8a4d1719b5637998638c42c097ac2fcf0db667c3043c0873f7e350badd9bab72f9c350badd9bab72f9c cc: freebsd-current@freebsd.org Subject: Re: Compaq and 5.1-RELEASE X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 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: Wed, 11 Jun 2003 09:29:02 -0000 Antony T Curtis wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > I'm trying to install 5.1-R onto a Compaq Amarda V300 series laptop. > If I allow ACPI to be loaded, it hangs pretty quick right after trying to > mount the memory disk. > > However, in safe mode, it works until during the unpacking/installing, I get a > > Fatal trap 12: page fault while in kernel mode > fault virtual address = 0x1c > fault code = supervisor write, page not present This is a dead giveaway that soemone is dereferencing a NULL pointer looking for a structure member at offset 28 decimal. If it were a much larger number, it would mean that someone was getting a page not present error on a real address, one that had been mapped and no longer was, or one as a result of a processor bug. In general, this is most likely a real bug. Maybe someone with access to the build machine with a symboled kernel can tell you what lives at 0x8:0xc02fb3c5 (the instruction pointer at the time of the fault), which would tell you (well, tell *them*) where the problem is, so that they could fix it, or give you some type of workaround. -- Terry