Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030199AbWAIRXH (ORCPT ); Mon, 9 Jan 2006 12:23:07 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030201AbWAIRXH (ORCPT ); Mon, 9 Jan 2006 12:23:07 -0500 Received: from iolanthe.rowland.org ([192.131.102.54]:36281 "HELO iolanthe.rowland.org") by vger.kernel.org with SMTP id S1030199AbWAIRXF (ORCPT ); Mon, 9 Jan 2006 12:23:05 -0500 Date: Mon, 9 Jan 2006 12:23:04 -0500 (EST) From: Alan Stern X-X-Sender: stern@iolanthe.rowland.org To: dtor_core@ameritech.net cc: Martin Bretschneider , , Jan Engelhardt , , Greg KH , Leonid Subject: Re: PROBLEM: PS/2 keyboard does not work with 2.6.15 In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1239 Lines: 31 On Mon, 9 Jan 2006, Dmitry Torokhov wrote: > > It would be nice to know which part of the usb-handoff code causes the > > problem. > > Well, it's not handoff code causing problems per se, it's just that it > does not look like it performs handoff. If it did then disabling USB > legacy emulation in BIOS would have no effect, right? On the other hand, if the BIOS worked correctly then the ps/2 port would have no problems regardless of whether USB legacy emulation was on or off. Given that the keyboard works during bootup, I see only two possibilities: The USB handoff code somehow causes the BIOS to mess up the state of the 8042; The 8042 driver interacts badly with the firmware when USB legacy emulation is on, and the USB handoff code doesn't successfully turn off legacy emulation. My earlier suggestion was an attempt to test the first possibility. The second is harder to test because it implies problems in both the 8042 driver and the USB handoff code. Alan Stern - 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/