Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751876AbWJIOZ7 (ORCPT ); Mon, 9 Oct 2006 10:25:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751886AbWJIOZ7 (ORCPT ); Mon, 9 Oct 2006 10:25:59 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:7172 "EHLO spitz.ucw.cz") by vger.kernel.org with ESMTP id S1751876AbWJIOZ6 (ORCPT ); Mon, 9 Oct 2006 10:25:58 -0400 Date: Sun, 8 Oct 2006 18:51:25 +0000 From: Pavel Machek To: Lukas Hejtmanek Cc: Magnus Damm , linux-kernel@vger.kernel.org Subject: Re: Machine reboot Message-ID: <20061008185125.GE4033@ucw.cz> References: <20061005105250.GI2923@mail.muni.cz> <20061005160518.GM2923@mail.muni.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20061005160518.GM2923@mail.muni.cz> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1433 Lines: 31 On Thu 05-10-06 18:05:18, Lukas Hejtmanek wrote: > On Thu, Oct 05, 2006 at 08:58:22PM +0900, Magnus Damm wrote: > > A long shot, but switching to real mode does not work if the cpu is > > running in VMX root mode ie on hardware with Intel VT extensions > > enabled. So if you are using some kind of kernel virtualization module > > on rather new hardware, consider rmmod:ing the module before > > rebooting. > > > > I'm about to post patches for kexec that fixes this problem, but I'm > > not sure about the current reboot status. > > You are right, I'm using Intel Core 2 Duo processor with DP965LT board that is > capable of VT extensions. However, I'm using vanilla 2.6.18 kernel in X86_64, > no additional patches, nor XEN or VMWARE is running (even their modules are > not loaded). Moreover, SYSRQ-B (emergency reboot) works fine. System graceful > reboot does not work. Of course... copy/paste pieces of sysrq-b sequence into regular sequence to find out what the critical difference is... no, it will not be easy. Perhaps your box *likes* to reboot with apic on or something? Perhaps device_shutdown() breaks your ability to reboot? -- Thanks for all the (sleeping) penguins. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/