From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 1 Aug 2001 17:40:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 1 Aug 2001 17:40:18 -0400 Received: from 209-221-203-158.dsl.qnet.com ([209.221.203.158]:13573 "HELO divino.rinspin.com") by vger.kernel.org with SMTP id ; Wed, 1 Aug 2001 17:40:12 -0400 Message-ID: <3B68771C.615A0C73@rinspin.com> Date: Wed, 01 Aug 2001 14:39:40 -0700 From: Scott Bronson X-Mailer: Mozilla 4.77 [en] (X11; U; Linux 2.4.7 i686) X-Accept-Language: en MIME-Version: 1.0 To: alan@lxorguk.ukuu.org.uk, Oliver Neukum , linux-kernel@vger.kernel.org Subject: AMD/VIA: v4l and adi conflict update Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Last week I described the conflict between v4l and the adi module I was seeing. Since then, Oliver Neukum and I have traced it to the K7 optimizations--if I optimize the stock 2.4.7 kernel for PII, the problem goes away. This is 100% reproducible. Can this provide any insight into the ongoing VIA problems? If anyone has anything they'd like me to test (Alan?), please tell me. I'm running a VIA Apollo KX133-based motherboard (700 MHz Athlon on an Epox EP-7KXA). The problem that I am tracking, real briefly, is if if I use v4l (either a bttv-based TV tuner or a webcam) before using the joystick after I boot the computer, the joystick fails to respond. However, if I use the joystick first, then everything works as it should. - Scott For completeness: In a different converstaion, Oliver Neukum wrote: >changing the compiler is unlikely to work, as most K7 optimisations are >assembly. > >However these problems are probably related to VIA chipsets. Your symptoms >are new. There is a chance that a report to the kernel mailing list and Alan >Cox might be valuable to those developing a workaround. > >There is a good chance that there's a bug in the DMA handling in the VIA >chipsets. It might be triggered by the picture transfers. >Please report this.