From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262834AbTDYAub (ORCPT ); Thu, 24 Apr 2003 20:50:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262792AbTDYAua (ORCPT ); Thu, 24 Apr 2003 20:50:30 -0400 Received: from sinfonix.rz.tu-clausthal.de ([139.174.2.33]:58613 "EHLO sinfonix.rz.tu-clausthal.de") by vger.kernel.org with ESMTP id S262884AbTDYAuV convert rfc822-to-8bit (ORCPT ); Thu, 24 Apr 2003 20:50:21 -0400 From: "Hemmann, Volker Armin" To: Dave Jones Subject: Re: [Patch?] SiS 746 AGP-Support Date: Fri, 25 Apr 2003 03:02:26 +0200 User-Agent: KMail/1.5.1 Cc: linux-kernel@vger.kernel.org References: <200304250224.50431.volker.hemmann@heim9.tu-clausthal.de> <20030425004003.GA12614@suse.de> In-Reply-To: <20030425004003.GA12614@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT Content-Disposition: inline Message-Id: <200304250302.26791.volker.hemmann@heim9.tu-clausthal.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Friday 25 April 2003 02:40, Dave Jones wrote: > > I don't know, if the following changes are 'clean' but they give me a > > working agpsupport for my SiS 746Fx based mobo. > > > > This (attempt) of a patch is against 2.4.21-rc1: > > Might work fine as long as you have an agp2.0 card in the slot, but the > minute you put a 3.0 (read as AGPx8) card in there, things are very > likely to break. > > I've not seen the specs for this chipset, but most of the AGP3 chipsets > I've seen have a fallback mode in their register set which gets enabled > as soon as you plug in an AGP2 card. These registers don't get enabled > with an AGP3 card, instead you need to read from different registers, > and in most cases, act completly different to decode aperture sizes etc. > > The generic routines in 2.5 *might* work, but are untested on this chipset. > 2.4 currently has no AGP3 support at all. Some folks did backport what > I've done in 2.5 a while ago, but I would advise against merging it at > this stage, as there is still work to be done there, including stability > fixes. Right there are a number of possible problems which may include > random memory corruption. > > Dave I have only a AGP 2 (geforce 4-mx) card, so I missed that(and with one I would only to be able to say 'it doesn't work' so thanks for your explanation). But without this changes I won't even able to use dga, because the first dga-enabled app completely locks up my box. And to have working AGP2 and non working APG3 looks a lot better for me than no AGP-support at all. 2.5.* is able to 'mostly' boot on my mobo so I can't say anything about that.. Glück Auf, Volker