From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965196AbXCNJFw (ORCPT ); Wed, 14 Mar 2007 05:05:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965257AbXCNJFw (ORCPT ); Wed, 14 Mar 2007 05:05:52 -0400 Received: from smtp01.cdmon.com ([86.109.99.230]:56714 "EHLO smtp01.cdmon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965196AbXCNJFa (ORCPT ); Wed, 14 Mar 2007 05:05:30 -0400 Date: Wed, 14 Mar 2007 10:06:55 +0100 From: DervishD To: "Antonino A. Daplas" Cc: Linux-kernel , Linux Fbdev development list Subject: Re: [TESTED] tdfx framebuffer garbles display in 2.6.19.5 Message-ID: <20070314090655.GA2466@DervishD> Mail-Followup-To: "Antonino A. Daplas" , Linux-kernel , Linux Fbdev development list References: <20070226144744.GA3615@DervishD> <1172503471.20842.14.camel@daplas> <20070226171334.GB13496@DervishD> <1172510654.7101.11.camel@daplas> <20070226203223.GA161@DervishD> <1172617755.13422.0.camel@daplas> <20070301160139.GA102@DervishD> <1173144817.7219.1.camel@daplas> <20070306062528.GF20292@DervishD> <1173164006.6285.8.camel@daplas> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1173164006.6285.8.camel@daplas> User-Agent: Mutt/1.4.2.2i Organization: DervishD Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi Antonino :) NEW INFORMATION ABOUT THE PROBLEM * Antonino A. Daplas dixit: > On Tue, 2007-03-06 at 07:25 +0100, DervishD wrote: > > > > With the patch, the scroll slows to a crawl and the system is > > > > unusable. The time to scroll 30 lines is about a minute or so > > > > (probably more, I just measured for a while). > > > > > > > > If you want me to test other patches, just tell :) > > > > > > Can you change the mdelay to udelay and use higher/lower delay values > > > to see if there's any improvement? > > > > Yes, as soon as I can build a new kernel and reboot. Any suggested > > value? > > You can start with 5 and increment by 5. So you need not reboot each > time, compile tdfxfb as a module, and set CONFIG_HW_CONSOLE_BINDING=y > (under drivers->char). Until I discovered how to reproduce the bug, I had to reboot for each test. But I discovered the real problem... The garbling doesn't happen, no matter the udelay, until I start X. Once X is started, even with an udelay(100) (which for me makes the display untolerably slow) the problem happens. This doesn't happen in latest 2.4.x, but I remember that some characters "dissappeared" from the screen at some 2.4.x when X was running. That was a known bug in the X driver of this card, so I'm not sure if the last X.Org driver has this problem or not. Unfortunately, I cannot test this directly, the most I can do is to test under Ubuntu, which uses an older 2.6.x kernel. If this new discovery doesn't ring any bell for you, I'll make a test under Ubuntu and after that I'll just wait until I can upgrade X (which I cannot do now) to latest X.Org (I'm now using 7.0.22). Thanks for all your help. I'll keep you informed of any change I notice, and (although I won't be very fast doing it...) you can count on me to test any patch you want. Raúl Núñez de Arenas Coronado -- Linux Registered User 88736 | http://www.dervishd.net It's my PC and I'll cry if I want to... RAmen!