From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 30 May 2002 05:41:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 30 May 2002 05:41:39 -0400 Received: from mail0.epfl.ch ([128.178.50.57]:15109 "HELO mail0.epfl.ch") by vger.kernel.org with SMTP id ; Thu, 30 May 2002 05:41:38 -0400 Message-ID: <3CF5F3D2.3020505@epfl.ch> Date: Thu, 30 May 2002 11:41:38 +0200 From: Nicolas Aspert Organization: LTS-DE-EPFL User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0rc3) Gecko/20020523 X-Accept-Language: en-us, ja MIME-Version: 1.0 To: Alessandro Morelli CC: Alan Cox , linux-kernel@vger.kernel.org Subject: Re: [PATCH,CFT] Tentative fix for agpgart (writing on 'reserved' bits) In-Reply-To: <3CF1EA3F.4070608@epfl.ch> <1022493086.11859.191.camel@irongate.swansea.linux.org.uk> <3CF1F4C0.5080201@epfl.ch> <1022494620.11859.207.camel@irongate.swansea.linux.org.uk> <3CF1FD4B.8060608@epfl.ch> <1022497386.11859.232.camel@irongate.swansea.linux.org.uk> <3CF205C1.6040408@epfl.ch> <1022498304.11859.239.camel@irongate.swansea.linux.org.uk> <3CF2144C.709@epfl.ch> <1022509981.11859.284.camel@irongate.swansea.linux.org.uk> <5.1.0.14.0.20020528103408.02ab1260@shiva.intra.alphac.it> <5.1.0.14.0.20020530110655.02afbb20@shiva.intra.alphac.it> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Alessandro Morelli wrote: > > Hello > I managed to get rid of customers, in order to test the patches.... > Bad news...no change... At least it is not worse (I hope ...) ;-) > I'm starting to believe I'm mad...my PC works like charm without AGP and > gets all mixed when I enabled it... Does it start messing right after you enable it, or only after you write to it (starting X...) ? > What kind of information can I provide (/proc readings, tests, etc.) to > shed some light? > > Could this be a case of interaction between AGP and VM? > > tlb-flush weirdness? > Apart from this kinda usual write-on-reserved-bits in the AGP initialization, which has been done before on various chipsets and almost never caused any trouble, I saw no blatant errors that may lead to such things... In fact, we have several PCs with i815 chipsets in the lab. People are using AGP without any troubles. The only difference is that we run an old kernel version (2.4.3-13, thanks the sysadmin for never upgrading....), and we have a different graphic card (Matrox). Alan, do you have any idea about this one ? Best regards -- Nicolas Aspert Signal Processing Institute (ITS) Swiss Federal Institute of Technology (EPFL)