From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758001AbZEDQlO (ORCPT ); Mon, 4 May 2009 12:41:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756961AbZEDQk5 (ORCPT ); Mon, 4 May 2009 12:40:57 -0400 Received: from darkcity.gna.ch ([195.226.6.51]:53831 "EHLO mail.gna.ch" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756595AbZEDQk4 convert rfc822-to-8bit (ORCPT ); Mon, 4 May 2009 12:40:56 -0400 Subject: Re: PROBLEM: 2.6.29.2 - AGP doesn't work anymore on my nforce2 From: Michel =?ISO-8859-1?Q?D=E4nzer?= To: Karsten Mehrhoff Cc: Shaohua Li , linux-kernel@vger.kernel.org, Andrew Morton , dri-devel@lists.sourceforge.net, stable@kernel.org In-Reply-To: References: <20090430175927.a89f1cd3.akpm@linux-foundation.org> <1241179733.2606.1.camel@localhost.localdomain> <55bc079c-5c3d-465a-be28-0e38c0b48b14@rrsmsx603.amr.corp.intel.com> <20090504014151.GA22872@sli10-desk.sh.intel.com> <1241449660.24202.1041.camel@thor.local> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Date: Mon, 04 May 2009 18:40:52 +0200 Message-Id: <1241455252.29445.49.camel@thor.local> Mime-Version: 1.0 X-Mailer: Evolution 2.26.1.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2009-05-04 at 18:23 +0200, Karsten Mehrhoff wrote: > On Mon, 04 May 2009 17:07:40 +0200, Michel Dänzer wrote: > > On Mon, 2009-05-04 at 08:31 +0200, Karsten Mehrhoff wrote: > >> On Mon, 04 May 2009 03:41:51 +0200, Shaohua Li wrote: > >>> On Fri, May 01, 2009 at 09:22:19PM +0800, kawime@gmx.de wrote: > >>>>> On Thu, 2009-04-30 at 17:59 -0700, Andrew Morton wrote: > >>>>>> On Thu, 30 Apr 2009 10:51:47 +0200 > >>>>>> Karsten Mehrhoff wrote: > >>>>>> > >>>>>>> [1.] > >>>>>>> PROBLEM: No more agp card functionality with the patch 2.6.29.2 of > >>>>>> 'a/drivers/char/agp/generic.c' > >>>>>>> > >>>>>>> [2.] > >>>>>>> I compiled the kernel 2.6.29.2 with my .config of 2.6.29.1 and run > >>>>>> into problems with the speed of my ATI RADEON 9600 (rv350) > >>>>>>> > >>>>>> > >>>>> > >>>>> Is your problem speed issue ? ie just a slowdown ? Or does AGP stop > >>>>> working with this patch ? Slowdown is expected from this patch but > >>>>> it should hurt too much. > >>>>> > >>>> > >>>> 2.6.29.1 | 2.6.29.2 > >>>> -------- | -------- > >>>> glxgears ~ 2900 FPS | ~ 75 FPS > >>>> glxgears -fullscreen ~ 500 FPS | ~ 11 FPS > >>> Does this patch alone give so huge slowdown? From my little knowledge, > >>> xserver > >>> does agp pages allocation only at startup. > >> > >> I only reverted this patch in the source file > >> (/drivers/char/agp/generic.c) and got back my old speed on 2.6.29.2. > > > > Is the DRI enabled in both cases? Compare the Xorg.0.log file and the > > output of > > > > dmesg|grep -e agp -e drm > > > > > ********************************* > 2.6.29.2 (original) > ********************************* > > $ dmesg|grep -e agp -e drm > $ dmesg|grep agp > [ 0.861997] Linux agpgart interface v0.103 > [ 10.893793] agpgart: Detected NVIDIA nForce2 chipset > [ 10.939070] agpgart-nvidia 0000:00:00.0: AGP aperture is 64M @ 0xe0000000 No drm lines? > $ glxinfo | grep direct > direct rendering: Yes This is not a sufficient test anymore since swrast_dri.so is direct rendering but not hardware accelerated. Something like glxinfo|grep render can be used to verify both direct rendering and hardware acceleration (the latter but not the former is also possible with AIGLX). > (EE) RADEON(0): [agp] AGP failed to initialize. Disabling the DRI. [...] > For me it seems that agp failed to initialize because of the patch. Indeed. -- Earthling Michel Dänzer | http://www.vmware.com Libre software enthusiast | Debian, X and DRI developer