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Date: Tue, 10 Jul 2007 19:34:16 +0200 From: Hanno Zulla <abos@...no.de> To: linux-kernel@...r.kernel.org Subject: Nova-T, cx88-dvb & "cx88_wakeup: 2 buffers handled (should be 1)" 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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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