Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751112AbWABWfa (ORCPT ); Mon, 2 Jan 2006 17:35:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751111AbWABWfa (ORCPT ); Mon, 2 Jan 2006 17:35:30 -0500 Received: from [81.2.110.250] ([81.2.110.250]:61895 "EHLO lxorguk.ukuu.org.uk") by vger.kernel.org with ESMTP id S1751112AbWABWf3 (ORCPT ); Mon, 2 Jan 2006 17:35:29 -0500 Subject: Re: Re; system keeps freezing once every 24 hours / random apps crashing From: Alan Cox To: Peter Missel Cc: video4linux-list@redhat.com, Mark v Wolher , Jiri Slaby , Sami Farin <7atbggg02@sneakemail.com>, Mauro Carvalho Chehab , jesper.juhl@gmail.com, Linux Kernel , s0348365@sms.ed.ac.uk, rlrevell@joe-job.com, arjan@infradead.org In-Reply-To: <200601020020.12190.peter.missel@onlinehome.de> References: <200512310027.47757.s0348365@sms.ed.ac.uk> <20060101191221.7E34322AEAC@anxur.fi.muni.cz> <43B82F87.5010804@ns666.com> <200601020020.12190.peter.missel@onlinehome.de> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Mon, 02 Jan 2006 22:29:43 +0000 Message-Id: <1136240983.8570.4.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 898 Lines: 20 On Llu, 2006-01-02 at 00:20 +0100, Peter Missel wrote: > Grabdisplay causes (roughly) twice the traffic. Overlay mode runs the TV > stream straight into the graphics card, peer-to-peer, while grabdisplay > streams into RAM, lets the CPU read from there, scale, and push into the > graphics card. > Pure overlay mode also produces zero CPU load. Grab display also stresses the main memory bus and bus arbitration logic which caused problems on some older chipsets many of which handled overlay mode fine. Equally some other older chipsets couldn't get PCI<->PCI right but worked for main memory. BT8x8's are very good for finding chipset problems. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/