From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751371AbVHVWWe (ORCPT ); Mon, 22 Aug 2005 18:22:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751378AbVHVWWd (ORCPT ); Mon, 22 Aug 2005 18:22:33 -0400 Received: from zeus1.kernel.org ([204.152.191.4]:45960 "EHLO zeus1.kernel.org") by vger.kernel.org with ESMTP id S1751371AbVHVWWb (ORCPT ); Mon, 22 Aug 2005 18:22:31 -0400 To: Meelis Roos Cc: Linux Kernel list Subject: Re: 2.6.13-rc6: halt instead of reboot References: From: ebiederm@xmission.com (Eric W. Biederman) Date: Mon, 22 Aug 2005 03:34:27 -0600 In-Reply-To: (Meelis Roos's message of "Mon, 22 Aug 2005 11:53:47 +0300 (EEST)") Message-ID: User-Agent: Gnus/5.1007 (Gnus v5.10.7) Emacs/21.4 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Meelis Roos writes: >> Does reboot=hard (on the kernel command line) change the behaviour? > > Will try in the evening. > >> Does magic sysrq work after the system hangs? > > It does not hang, it just powers off like on halt. Ok. Then at least in part the kernel behavior is either intersecting with a BIOS bug, a bad reboot script that calls halt instead, or a driver that is scribbling on the wrong register. There is nothing in that code path that should remove the power. >> Can you narrow it down to a -git snapshot where reboot breaks for >> you? > > Quite hard - it's a production multiuser machine and gateway. Will see what I > can find. Ok. Until I have something to go on I don't have a clue where to start. Eric