Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 4 Dec 2002 09:28:40 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 4 Dec 2002 09:28:40 -0500 Received: from noodles.codemonkey.org.uk ([213.152.47.19]:41665 "EHLO noodles.internal") by vger.kernel.org with ESMTP id ; Wed, 4 Dec 2002 09:28:39 -0500 Date: Wed, 4 Dec 2002 14:33:37 +0000 From: Dave Jones To: Alex Bennee Cc: Linux Kernel Mailing List Subject: Re: Ctrl-Alt-Backspace kills machine not X. ACPI? Message-ID: <20021204143337.GK647@suse.de> Mail-Followup-To: Dave Jones , Alex Bennee , Linux Kernel Mailing List References: <1039005946.2366.25.camel@cambridge.braddahead> <20021204131514.GG647@suse.de> <1039012040.2588.20.camel@cambridge.braddahead> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1039012040.2588.20.camel@cambridge.braddahead> User-Agent: Mutt/1.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 974 Lines: 22 On Wed, Dec 04, 2002 at 02:27:19PM +0000, Alex Bennee wrote: > I was under the impression that once Linux took over from the BIOS it > had complete control of the system, including the interrupt/exception > table. I am assuming some sort of interrupt or exception must be being > generated by this keypress that runs some BIOS code. It's likely an SMM event, which Linux doesn't even get to see. The BIOS handles it appropriately. The chipset has a bit you can flip to disable this 'feature', but there was a caveat iirc, something like 'it turns itself back on every so often'. I'll let Egbert say more about it, as he had the relevant datasheet. Dave -- | Dave Jones. http://www.codemonkey.org.uk | SuSE Labs - 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/