From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757405AbZKCAG3 (ORCPT ); Mon, 2 Nov 2009 19:06:29 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757389AbZKCAG1 (ORCPT ); Mon, 2 Nov 2009 19:06:27 -0500 Received: from mail-yx0-f187.google.com ([209.85.210.187]:41257 "EHLO mail-yx0-f187.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757385AbZKCAGY (ORCPT ); Mon, 2 Nov 2009 19:06:24 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=AiRvQK7EsRE2Zu/M8R8Ou+dV/ckjgF5D+uerQ//Rz4a6JorWPhbfUwUISWUEVKtb2n 7hdpZ4Mcnsgj13jX+jF8PXGVl/bBe0pfAoJCqrZ4c+XyMDNobGOMdEMsK7YzunQnIecl eyJakWs4YaYV4ipxglLp/rYPku0oJzUonRNDM= Message-ID: <4AEF7402.1010901@gmail.com> Date: Mon, 02 Nov 2009 18:06:26 -0600 From: Robert Hancock User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.4pre) Gecko/20091014 Fedora/3.0-2.8.b4.fc11 Thunderbird/3.0b4 MIME-Version: 1.0 To: mehmet@giritli.eu CC: linux-kernel@vger.kernel.org Subject: Re: Faulty MTRR setups in Toshiba laptops crash video drivers References: <1257179328.13327.34.camel@frodo.giritli.eu> In-Reply-To: <1257179328.13327.34.camel@frodo.giritli.eu> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/02/2009 10:28 AM, Mehmet Giritli wrote: > Hello all, > > On some laptops using ATI 3650HD radeon chipsets and 4GB ram (and may be > others as well), it is impossible to start any xserver due to (faulty?) > mtrr setups on the machine. The computer locks up or just gives an > unresponsive black screen. There are various drivers for radeon cards > and the crash occurs in all of these drivers in the very same way! > > This bug seems to occur mostly on Toshiba laptops with ATI graphic > cards. For some people, CONFIG_MTRR_SANITIZER seemed to cure the issue > but made no difference for many others like me. > > RadeonHD people seem to have problems in understanding the nature of > this bug. Please have a look at the threads: > > http://lists.opensuse.org/radeonhd/2009-05/msg00040.html > > and, > > http://bugs.freedesktop.org/show_bug.cgi?id=20645 > > for problem reports and dev responses. RadeonHD devs suggest that some > laptops have weird mtrr setups and this must be fixed in the kernel code > and not the driver code. Unfortunately I don't see enough details to be able to tell what lead them to this conclusion. Can you post the output of: lspci -vv cat /proc/mtrr > > Currently, the only way that could make the driver work is to reduce the > 4GB ram to 2GB. > > dmesg from my affected machine when it has 4GB ram installed can be > found here: > > http://bugzilla.kernel.org/attachment.cgi?id=22856 > > Also, look at the report here: > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/341681 > > in order to see how many people are being affected by this bug! > > Kind Regards, > M. Giritli > >