From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265429AbUHHPFY (ORCPT ); Sun, 8 Aug 2004 11:05:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265492AbUHHPFY (ORCPT ); Sun, 8 Aug 2004 11:05:24 -0400 Received: from smtp807.mail.sc5.yahoo.com ([66.163.168.186]:37034 "HELO smtp807.mail.sc5.yahoo.com") by vger.kernel.org with SMTP id S265429AbUHHPFR (ORCPT ); Sun, 8 Aug 2004 11:05:17 -0400 From: Dmitry Torokhov To: linux-kernel@vger.kernel.org Subject: Re: 2.6 kernel won't reboot on AMD system - 8042 problem? Date: Sun, 8 Aug 2004 10:05:14 -0500 User-Agent: KMail/1.6.2 Cc: Sascha Wilde , "David N. Welton" , James Lamanna References: <4112A626.1000706@appliedminds.com> <41133FE1.2040906@eidetix.com> <20040808121837.GA912@kenny.sha-bang.local> In-Reply-To: <20040808121837.GA912@kenny.sha-bang.local> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <200408081005.14832.dtor_core@ameritech.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sunday 08 August 2004 07:18 am, Sascha Wilde wrote: > On Fri, Aug 06, 2004 at 10:22:57AM +0200, David N. Welton wrote: > > [ Re-added Sascha to the CC, as he's interested in this too. ] > > > > James Lamanna wrote: > > > > >Change i8042.c:62 to > > >#define DEBUG > > >And see what printk's you get on trying to reboot. > > >i8042_command has a bunch in it that are turned off by default. > > I just did some further testing, the problem here is exactly the same > as Davids. And thinking about the exact point of failure and that > Davids reboot problem is related to the keyboard being attached or not > I realized what causes the problems for me: > > I have a keyboard attached to the PS/2 port, but my mouse is attached > to USB. So I pluged in a PS/2 mouse, and guess what? The box > rebooted! > > Well, this is by no means a solution, but I think it's pretty clear > now, what exactly causes the trouble. Now we have to find out, why > the i8042 code in 2.6.x breaks things on sertain hardware when there > are not devices present in all ports, while in 2.4.x everything went > well... > You could also try out the following scenario: remove your USB mouse and _do not_ plug PS/2 one... What you might be seeing is another case of USB Legacy emulation thingy getting in your way. -- Dmitry