From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 31 May 2002 18:56:26 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 31 May 2002 18:56:25 -0400 Received: from pc2-cwma1-5-cust12.swa.cable.ntl.com ([80.5.121.12]:51183 "EHLO irongate.swansea.linux.org.uk") by vger.kernel.org with ESMTP id ; Fri, 31 May 2002 18:56:24 -0400 Subject: Re: linux-2.4.19-pre9-ac3: PnPBIOS crash From: Alan Cox To: Chris Rankin Cc: linux-kernel@vger.kernel.org In-Reply-To: <200205312208.g4VM8unD001714@twopit.underworld> Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Ximian Evolution 1.0.3 (1.0.3-6) Date: 01 Jun 2002 01:00:47 +0100 Message-Id: <1022889647.20348.16.camel@irongate.swansea.linux.org.uk> Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2002-05-31 at 23:08, Chris Rankin wrote: > I have a dual PIII machine with 1.25 GB of RAM, and I have just > installed a 2.4.19-pre9-ac3 kernel. (I also have ALSA CVS and lm > sensors 2.6.3 installed.) > > Anyway, I decided to compile in the PNPBIOS feature and discovered > that: > > # cat /proc/bus/pnp/escd > > is a synonym for "cold reboot". Now I understand that *writing* to > random /proc files is a Bad Thing, but reading them??? I would have > thought that the worst I could have done would have been corrupting my > termininal. Is the escd file my actual ESCD area? > > Is this a bug, or just a case of "don't do that!"? Could be either. It should dump the ESCD by asking the BIOS for it. It could be there is a case we are calling wrong, could be a BIOS bug where the BIOS can't handle BIOS32 ESCD Alan