From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763752AbXGJSGr (ORCPT ); Tue, 10 Jul 2007 14:06:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755160AbXGJSGi (ORCPT ); Tue, 10 Jul 2007 14:06:38 -0400 Received: from mail-1.epublica.de ([213.238.59.6]:60318 "EHLO mail-1.epublica.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759292AbXGJSGh (ORCPT ); Tue, 10 Jul 2007 14:06:37 -0400 X-Greylist: delayed 1937 seconds by postgrey-1.27 at vger.kernel.org; Tue, 10 Jul 2007 14:06:37 EDT Message-ID: <4693C318.8040105@hanno.de> Date: Tue, 10 Jul 2007 19:34:16 +0200 From: Hanno Zulla User-Agent: Thunderbird 1.5.0.10 (X11/20070403) MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: Nova-T, cx88-dvb & "cx88_wakeup: 2 buffers handled (should be 1)" Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, [ please cc me with replies. ] I have asked this upstream at linux-dvb [1] and to the Ubuntu kernel's bugtracker [2], but no help so far. Googling around, one can find other reports about this, but no solution, either. Using a Nova-T dvb card, I get the following in /var/log/messages... 22:09:54 kernel: cx88_wakeup: 2 buffers handled (should be 1) 22:09:57 kernel: cx88_wakeup: 2 buffers handled (should be 1) 22:10:06 kernel: cx88_wakeup: 2 buffers handled (should be 1) 22:10:09 kernel: cx88_wakeup: 2 buffers handled (should be 1) 22:10:12 kernel: cx88_wakeup: 2 buffers handled (should be 1) 22:10:15 kernel: cx88_wakeup: 2 buffers handled (should be 1) ...every few seconds while watching TV with xine or other dvb-apps. The event results in a visible interruption of the video stream. Looking on the net for solutions, I tried these: - changing pci latency in the bios settings - putting the card into a different pci slot - using "pci=routeirq" or "pci=noacpi" kernel boot parameters NONE of these solved the problem. Please see [2] for more info. The problem appears with three different recent Linux distribution kernels: Ubuntu 2.6.22-7-generic, Ubuntu 2.6.20-15-generic, Suse 2.6.18.2-34-default. The problem is not hardware-specific, it appears with an Intel CPU and Intel chipset as well as with an AMD CPU and a VIA chipset. The problem appears to be shared irq resources [3]. However, my mainboard doesn't allow to choose specific irqs for pci slots and anyway, shared irqs shouldn't break this dvb card, in the first place. What else can I try? Thanks for any help, Hanno [1] http://www.linuxtv.org/pipermail/linux-dvb/2007-May/018232.html http://www.linuxtv.org/pipermail/linux-dvb/2007-July/018881.html [2] https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/119115 [3] http://launchpadlibrarian.net/8036103/lspci-vvnn.log http://launchpadlibrarian.net/8283449/lspci-vv.log