From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933200Ab1KCMPB (ORCPT ); Thu, 3 Nov 2011 08:15:01 -0400 Received: from mail-iy0-f174.google.com ([209.85.210.174]:53956 "EHLO mail-iy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933086Ab1KCMO6 (ORCPT ); Thu, 3 Nov 2011 08:14:58 -0400 MIME-Version: 1.0 Date: Thu, 3 Nov 2011 14:14:56 +0200 Message-ID: Subject: Simultaneous cat and external keyboard input causing kernel panic From: Timo Jyrinki To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I encountered a kernel panic with the 3.1.0 kernel on a Dell Latitude E6410 while inputting simultaneously from the integrated keyboard with a cat and from the external keyboard myself. I was trying to type my password with the external keyboard (pw dialog already visible), but I noticed that the computer didn't seem responsive to my typing. Then suddenly the cat shifted his position and there was a kernel panic involving input handling. I'm now using i8042.nokbd kernel parameter as a workaround, something I've found useful also earlier. I wonder if anyone else is experiencing similar problems? This didn't seem to happen with 3.0, which was the first kernel version I used on this E6410. Although it has to be noted that the internal keyboard input was not yet as heavy either at that time. Please test if you can reproduce the problem. Photos of the panic at http://people.debian.org/~timo/kernelpaniccat/. The first one was taken about ten seconds after the panic and shows the original cat positioning. The two other ones show alternative possible positions together with more of the panic text. There is also one photo showing the pre-crash setup, which I happened to take without anticipating a panic. The similar but black input weight was not in use. The kernel was tainted because the Intel "mei" module from staging was loaded. The kernel used was the final 3.1 from the ubuntu mainline ppa archives for amd64. Thank you, Timo Jyrinki