From owner-freebsd-current@FreeBSD.ORG  Tue Aug 24 08:02:24 2004
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
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 5F78916A4CE
	for <freebsd-current@freebsd.org>;
	Tue, 24 Aug 2004 08:02:24 +0000 (GMT)
Received: from av5-1-sn3.vrr.skanova.net (av5-1-sn3.vrr.skanova.net
	[81.228.9.113])	by mx1.FreeBSD.org (Postfix) with ESMTP id 4D20D43D1F
	for <freebsd-current@freebsd.org>;
	Tue, 24 Aug 2004 08:02:23 +0000 (GMT)
	(envelope-from martin@gneto.com)
Received: by av5-1-sn3.vrr.skanova.net (Postfix, from userid 502)
	id A811637ECD; Tue, 24 Aug 2004 10:02:22 +0200 (CEST)
Received: from smtp4-2-sn2.hy.skanova.net (smtp4-2-sn2.hy.skanova.net
	[81.228.8.93])
	by av5-1-sn3.vrr.skanova.net (Postfix) with ESMTP id 9640137E44
	for <freebsd-current@freebsd.org>;
	Tue, 24 Aug 2004 10:02:22 +0200 (CEST)
Received: from [192.168.2.10] (h118n1fls31o985.telia.com [213.65.16.118])
	by smtp4-2-sn2.hy.skanova.net (Postfix) with ESMTP id 6935A37E43
	for <freebsd-current@freebsd.org>;
	Tue, 24 Aug 2004 10:02:22 +0200 (CEST)
Message-ID: <412AF60D.2060408@gneto.com>
Date: Tue, 24 Aug 2004 10:02:21 +0200
From: Martin Nilsson <martin@gneto.com>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US;
	rv:1.7.2) Gecko/20040803
X-Accept-Language: sv, en-us, en
MIME-Version: 1.0
To: freebsd-current@freebsd.org
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
Subject: BTX halted problem with 5.3-beta1
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 24 Aug 2004 08:02:24 -0000

I get the infamous BTX halted problem when booting the 5.3b1 CD in a USB 
connected CDROM drive on the Supermicro P4SCi motherboard.
It works with a regular ATAPI CDROM. The older P4SGE boards works well 
with USB-CD booting (at least after i fixed cdboot a couple of months ago).

I found that turning off legacy USB helped someone in the past but it 
didn't do anything for this board. I also found that turning off ATA DMA 
mode might help but this BIOS don't let me do that.

Does anybody know what is causing this and a possible cure?
I'm going to try to debug this over the weekend so if I can get some 
clues to work with before friday I'm hoping to get a head start.

/Martin