Re: Xen 4.2.0-rc4 issues with DVB tuner

[Javier Marcet <jmarcet@gmail.com>]

On Mon, Sep 17, 2012 at 4:28 PM, Konrad Rzeszutek Wilk
<konrad@kernel.org> wrote:

>> >> I wonder whether it would work within a DomU with the PCIe tuner
>> >> passed through.
>> >
>> > I've a 4 channel security card passed in and it works nicely. The
>> > trick is that you need 'iommu=soft' on the domU command line.
>>
>> All right. But is it normal that it does not work under the dom0?
>
> No. PV domU and PV dom0 are pretty much the same in the way of handling
> interrupts, ports, etc.
>
> If you crank up the debug level of the kernel (debug loglevel=8) and
> of the driver do you get anything obvious? What about the questions
> I've asked?

Booting with 'debug loglevel=8' as kernel parameters I still get no errors or
warnings anywhere.

I'm out of ideas and I don't have any other PCIe tuner card to try.

It is looking more and more as a cx23885 (the module the card uses) issue.
It is really odd since I you get some data, but just like if there was very
poor reception, more noise than signal.

If you can think of some other way to debug this, I'll try it.


-- 
Javier Marcet <jmarcet@gmail.com>