From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bodo Eggert <7eggert@gmx.de> Subject: Re: Regression: radeonfb: No synchronisation on CRT with linux-2.6.13-rc5 Date: Mon, 8 Aug 2005 02:06:52 +0200 (CEST) Message-ID: References: <1123195493.30257.75.camel@gaston> <1123401069.30257.102.camel@gaston> <3EF2003B-12DF-4EBB-B304-59614AEFAA09@mac.com> <1123451289.30257.118.camel@gaston> Reply-To: linux-fbdev-devel@lists.sourceforge.net Mime-Version: 1.0 Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1E1vAU-0008Fy-FV for linux-fbdev-devel@lists.sourceforge.net; Sun, 07 Aug 2005 17:07:02 -0700 Received: from mail-in-02.arcor-online.net ([151.189.21.42]) by mail.sourceforge.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.44) id 1E1vAS-0006Fa-PC for linux-fbdev-devel@lists.sourceforge.net; Sun, 07 Aug 2005 17:07:02 -0700 In-Reply-To: <1123451289.30257.118.camel@gaston> Sender: linux-fbdev-devel-admin@lists.sourceforge.net Errors-To: linux-fbdev-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: List-Post: List-Help: List-Subscribe: , List-Archive: Content-Type: TEXT/PLAIN; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Benjamin Herrenschmidt Cc: Bodo Eggert <7eggert@gmx.de>, Kyle Moffett , LKML , linux-fbdev-devel@lists.sourceforge.net On Sun, 7 Aug 2005, Benjamin Herrenschmidt wrote: > On Sun, 2005-08-07 at 19:25 +0200, Bodo Eggert wrote: > > On Sun, 7 Aug 2005, Kyle Moffett wrote: > > > On Aug 7, 2005, at 03:51:07, Benjamin Herrenschmidt wrote: > > > > Ah ! Interesting... I don't see why PREEMPT would affect radeonfb > > > > though ... Can you try something like wrapper radeon_write_mode() with > > > > preempt_disable()/preempt_enable() and tell me if it makes a > > > > difference ? > > > > Did not help. The values used to initialize the mode seem to be wrong. > > Copying the aty directory from 2.6.12 did not help, too. > > I don't see how PREEMPT could have any impact there unless you are > experiencing memory corruption... or one of those panels that have so > subtle timing issues that they sometimes don't sync depending on how > many flies you have in your room.... The wrong values are constant across reboots (see my first mail), and I have a CRT. Can you tell me where the timing values are read? -- E.G.G.E.R.T.: Electronic Guardian Generated for Efficient Repair and Troubleshooting -- http://www.brunching.com/toys/toy-cyborger.html ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf