On Tue, Sep 18, 2012 at 5:40 AM, Devin Heitmueller <dheitmueller@xxxxxxxxxxxxxx> wrote: >> Initially I thought Xen would be the cause of the problem, but after >> having written on >> the Xen development mailing list and talked about it with a couple >> developers, it isn't >> very clear where the problem is. So far I haven't been able to get the >> smallest warning >> or error. > > This is a very common problem when attempting to use any PCI/PCIe > tuner under a hypervisor. Essentially the issue is all of the > virtualization solutions provide very poor interrupt latency, which > results in the data being lost. > > Devices delivering a high bitrate stream of data in realtime are much > more likely for this problem to be visible since such devices have > very little buffering (it's not like a hard drive controller where it > can just deliver the data slower). The problem is not specific to the > cx23885 - pretty much all of the PCI/PCIe bridges used in tuner cards > work this way, and they cannot really be blamed for expecting to run > in an environment with really crappy interrupt latency. > > I won't go as far as to say, "abandon all hope", but you're not really > likely to find any help in this forum. Well, it is not what I wanted to hear but at least I know for sure what is happening. I´ve post your words on the xen ml, I´ll see what they have to say. I still don´t understand how graphics pass through works and a tuner card has problems. I also have read reports of people running vdr on a domU. Anyway, thanks for the prompt and quick answer. -- Javier Marcet <jmarcet@xxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
