From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761870AbXGYHFk (ORCPT ); Wed, 25 Jul 2007 03:05:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754129AbXGYHF3 (ORCPT ); Wed, 25 Jul 2007 03:05:29 -0400 Received: from smtp2.linux-foundation.org ([207.189.120.14]:53237 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750944AbXGYHF3 (ORCPT ); Wed, 25 Jul 2007 03:05:29 -0400 Date: Wed, 25 Jul 2007 00:05:04 -0700 From: Andrew Morton To: Chris Lalancette Cc: linux-kernel@vger.kernel.org, dmitry.torokhov@gmail.com, linux-input@atrey.karlin.mff.cuni.cz Subject: Re: [PATCH]: Add command-line option to i8042 to completely disable it Message-Id: <20070725000504.f8ce49c1.akpm@linux-foundation.org> In-Reply-To: <46A4DFD2.2010501@redhat.com> References: <46A4DFD2.2010501@redhat.com> X-Mailer: Sylpheed 2.4.1 (GTK+ 2.8.17; x86_64-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 23 Jul 2007 13:05:22 -0400 Chris Lalancette wrote: > (I tried to send this patch to linux-input@, but it seems to be currently having > some problems, so I'm going directly to LKML). > > Certain (broken) pieces of South Bridge hardware will respond to > i8042_read_status() on boot with 0x0, despite there not being a real i8042 > controller hooked up in the south bridge. This can cause the detection for the > i8042 to return a "phantom" device, which hangs up later initialization. Note > that using "i8042.nokbd" and/or "i8042.noaux" do not help with this, since this > shows up during i8042_controller_check() (before either of those options are > checked). This patch adds a command-line option "i8042.disable", which just > completely disables any checking for the i8042 controller. That's an unfortunate fix. Is there really no way in which we can auto-detect such a situation without requiring a manual setting?