From mboxrd@z Thu Jan 1 00:00:00 1970 From: DervishD Subject: Re: [TESTED] tdfx framebuffer garbles display in 2.6.19.5 Date: Wed, 14 Mar 2007 10:06:55 +0100 Message-ID: <20070314090655.GA2466@DervishD> 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> Reply-To: linux-fbdev-devel@lists.sourceforge.net Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1HRPQR-0001Vh-L4 for linux-fbdev-devel@lists.sourceforge.net; Wed, 14 Mar 2007 02:05:39 -0700 Received: from smtp01.cdmon.com ([86.109.99.230]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1HRPQQ-0003ar-44 for linux-fbdev-devel@lists.sourceforge.net; Wed, 14 Mar 2007 02:05:39 -0700 Content-Disposition: inline In-Reply-To: <1173164006.6285.8.camel@daplas> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-fbdev-devel-bounces@lists.sourceforge.net Errors-To: linux-fbdev-devel-bounces@lists.sourceforge.net To: "Antonino A. Daplas" Cc: Linux Fbdev development list , Linux-kernel 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=3Dy > (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. Ra=FAl N=FA=F1ez de Arenas Coronado -- = Linux Registered User 88736 | http://www.dervishd.net It's my PC and I'll cry if I want to... RAmen! ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=3Djoin.php&p=3Dsourceforge&CID=3DDE= VDEV