From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261690AbVGaMYJ (ORCPT ); Sun, 31 Jul 2005 08:24:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261716AbVGaMYI (ORCPT ); Sun, 31 Jul 2005 08:24:08 -0400 Received: from electric-eye.fr.zoreil.com ([213.41.134.224]:56268 "EHLO fr.zoreil.com") by vger.kernel.org with ESMTP id S261690AbVGaMYH (ORCPT ); Sun, 31 Jul 2005 08:24:07 -0400 Date: Sun, 31 Jul 2005 14:20:34 +0200 From: Francois Romieu To: apache Cc: linux-kernel@vger.kernel.org Subject: Re: How come that in kernel 2.6.11 a dvd is readable, but not in kernel 2.6.12? Message-ID: <20050731122034.GA32232@electric-eye.fr.zoreil.com> References: <42ECB294.7040608@ayni.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <42ECB294.7040608@ayni.com> User-Agent: Mutt/1.4.2.1i X-Organisation: Land of Sunshine Inc. Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org apache : [...] > Fact: I can write a DVD on a machine with kernel-2.6.11, but I cannot > read that DVD in a machine with kernel-2.6.12, even worse: the system is > stuck. > > please explain I can't explain but we may try to fix it with your help. As a general remark, dmesg + .config + lspci -vx/lsmod help figuring the hardware environment. 1 - can the regression be reproduced with last -rc (namely 2.6.13-rc4) ? 2 - if yes, can you isolate a simple operation to trigger the bug: I assume you read the DVD from hell with some nice viewer under X. Can you reproduce the bug in a simple console, without X, through a 'dd' command for instance ? 3 - if so, did you notice extra messages ? Is led activity available ? 4 - if you are still stuck, you can start a binary search on the 2.6.12-rc kernels, then on the 2.6.12-rcX-gitY to isolate the trigger (it may not necessarily be the culprit). -- Ueimor