From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261342AbVEaTrK (ORCPT ); Tue, 31 May 2005 15:47:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261354AbVEaTrK (ORCPT ); Tue, 31 May 2005 15:47:10 -0400 Received: from viper.oldcity.dca.net ([216.158.38.4]:55203 "HELO viper.oldcity.dca.net") by vger.kernel.org with SMTP id S261342AbVEaTrG (ORCPT ); Tue, 31 May 2005 15:47:06 -0400 Subject: Re: RT : 2.6.12rc5 + realtime-preempt-2.6.12-rc5-V0.7.47-15 From: Lee Revell To: Serge Noiraud Cc: linux-kernel , Ingo Molnar In-Reply-To: <1117551231.19367.48.camel@ibiza.btsn.frna.bull.fr> References: <1117551231.19367.48.camel@ibiza.btsn.frna.bull.fr> Content-Type: text/plain Date: Tue, 31 May 2005 15:47:04 -0400 Message-Id: <1117568825.23283.5.camel@mindpipe> Mime-Version: 1.0 X-Mailer: Evolution 2.3.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2005-05-31 at 16:53 +0200, Serge Noiraud wrote: > I have a test program which made a loop in RT to mesure the system > perturbation. > It works finely in a tty environment. > When I run it in an X environment ( xterm ), I get something like if I > click the Enter key in the active window. > If I open a new xterm, this is the new active window which receive these > events. > These events stop when the program stop. > > I tried with X in RT and no RT : I have the problem. Try adding: Option "NoAccel" to the Driver section of your X config. Some buggy video drivers can stall the PCI bus for tens or hundreds of *milliseconds*. The "via" driver had this problem until I identified the problem and the Unichrome guys fixed it. If it goes away with "NoAccel", then you are having the same problem. For details search the unichrome-devel archives for "losing interrupts". Lee