From owner-freebsd-current@FreeBSD.ORG Tue Aug 19 11:01:37 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 0104D16A4BF for ; Tue, 19 Aug 2003 11:01:37 -0700 (PDT) Received: from sccmmhc02.asp.att.net (sccmmhc02.asp.att.net [204.127.203.184]) by mx1.FreeBSD.org (Postfix) with ESMTP id 51D6343F3F for ; Tue, 19 Aug 2003 11:01:36 -0700 (PDT) (envelope-from stephen@math.missouri.edu) Received: from math.missouri.edu (12-216-240-169.client.mchsi.com[12.216.240.169]) by sccmmhc02.asp.att.net (sccmmhc02) with SMTP id <20030819180131mm200e7aege>; Tue, 19 Aug 2003 18:01:31 +0000 Message-ID: <3F4265FA.2070607@math.missouri.edu> Date: Tue, 19 Aug 2003 13:01:30 -0500 From: Stephen Montgomery-Smith User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.4) Gecko/20030731 X-Accept-Language: en-us, en MIME-Version: 1.0 To: freebsd-current@freebsd.org References: In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: ACPI on Tyan Motherboard 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: Tue, 19 Aug 2003 18:01:37 -0000 John Baldwin wrote: > On 19-Aug-2003 Stephen Montgomery-Smith wrote: > >>I am guessing that this 4 second delay is part of how FreeBSD wants it. If that >>is the case, it shows that the power button is working as it should - it is the >>power-down process that is not working right. > > > No, the 4 second countdown thing is in the BIOS/hardware and is not OS > dependent at all. If the box doesn't properly shut off when you hold > the power button for 4 seconds, that is a hardware or BIOS bug and > something FreeBSD has no control over. > FreeBSD must have some control over this process, because in FreeBSD-4.8 and RedHat 9.0 (which make no attempt to access ACPI), the power button immediately powers down the computer. The same is also true if I start FreeBSD-current with ACPI support switched off. (Windows 2000 also works fast, but the Windows 2000 OS first cleanly shuts down the file system.) But now that people are mentioning this 4 second issue, I have now also noticed that if I do "halt -p" under FreeBSD-current, the OS does all its shutdown stuff, prints the message "Uptime xxxxx", and then waits about 4 seconds before doing its powerdown attempt. -- Stephen Montgomery-Smith stephen@math.missouri.edu http://www.math.missouri.edu/~stephen