Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757292AbYGaOjU (ORCPT ); Thu, 31 Jul 2008 10:39:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752737AbYGaOjL (ORCPT ); Thu, 31 Jul 2008 10:39:11 -0400 Received: from out1.smtp.messagingengine.com ([66.111.4.25]:46684 "EHLO out1.smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753223AbYGaOjK (ORCPT ); Thu, 31 Jul 2008 10:39:10 -0400 X-Sasl-enc: X12N8n//ur7LDqYYb1TaVOl6/Pqp9L+Kud0PilWmTPGs 1217515148 Date: Thu, 31 Jul 2008 11:39:05 -0300 From: Henrique de Moraes Holschuh To: Zdenek Kabelac Cc: Linux Kernel Mailing List Subject: Re: Sysrq+B doesn't work on my box Message-ID: <20080731143905.GF19665@khazad-dum.debian.net> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-GPG-Fingerprint: 1024D/1CDB0FE3 5422 5C61 F6B7 06FB 7E04 3738 EE25 DE3F 1CDB 0FE3 User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1473 Lines: 32 On Thu, 31 Jul 2008, Zdenek Kabelac wrote: > I'd like to get resolved this problem - my T61 machine doesn't reboot > with SysRQ+B key. > And I never remember if it was ever rebooting. > > This is all I know so far and I've no idea where could be the problem. Well, many of the different ThinkPad BIOSes are really sensitive to the proper boot/reboot/shutdown sequence (whatever it is). Otherwise, the thing gets stuck in SMBIOS limbo and hung. For exeample, we had major issues with boxes that only shut down half-way and ended up draining the cells to critical levels, a few months ago. I don't know what finally fixed THAT one, but it was ugly. Here is another example: you can't get the TCO watchdog to reboot all (any?) thinkpads properly on hardware. In my T43, the TCO watchdog IS hooked to something, but the BIOS hates it to trip and the entire box goes to neverland when it fires... If sysrq+b uses a different reboot path than the normal reboot path, it is the first hint of what is missing... -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh -- 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/