From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751222AbVHGHzw (ORCPT ); Sun, 7 Aug 2005 03:55:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751234AbVHGHzw (ORCPT ); Sun, 7 Aug 2005 03:55:52 -0400 Received: from gate.crashing.org ([63.228.1.57]:49874 "EHLO gate.crashing.org") by vger.kernel.org with ESMTP id S1751222AbVHGHzw (ORCPT ); Sun, 7 Aug 2005 03:55:52 -0400 Subject: Re: Regression: radeonfb: No synchronisation on CRT with linux-2.6.13-rc5 From: Benjamin Herrenschmidt To: Bodo Eggert <7eggert@gmx.de> Cc: LKML , linux-fbdev-devel@lists.sourceforge.net In-Reply-To: References: <1123195493.30257.75.camel@gaston> Content-Type: text/plain Date: Sun, 07 Aug 2005 09:51:07 +0200 Message-Id: <1123401069.30257.102.camel@gaston> Mime-Version: 1.0 X-Mailer: Evolution 2.2.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2005-08-05 at 19:38 +0200, Bodo Eggert wrote: > On Fri, 5 Aug 2005, Benjamin Herrenschmidt wrote: > > > On Fri, 2005-08-05 at 00:03 +0200, Bodo Eggert wrote: > > > My CRT is out of sync after radeonfb from 2.6.13-rc5 is initialized. > > > 2.6.12 does not show this behaviour. > > > > I'm out of town at the moment, could you maybe diff radeonfb between > > working & non-working and CC me the diff ? I don't have my work stuff at > > hand not my kernel images so... > > There were no changes in radeonfb.c, but I could trace to to > CONFIG_PREEMPT. With _NONE, it works as expected. 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 ? Ben.