On Thu, Oct 1, 2015 at 3:27 AM, Phil (list) <pbpublist@xxxxxxxxx> wrote:
> If this isn't the right place to ask, any pointers to the correct place
> are appreciated...
>
> I'm trying to see if I can get PCI passthrough working for a video
> capture card (Hauppauge Colossus 1x PCIe) under a Windows XP guest (32
> -bit). Things appear to be somewhat working (Windows is seeing the
> device, the drivers successfully installed, and device manager
> indicates everything is working) however when I fire up the capture
> application, it is not able to find the device despite Windows
> recognizing it (no errors, it just doesn't 'see' any installed capture
> devices). There is also a secondary capture/viewer application that
> won't even install due to not being able to find a capture card. Since
> that wasn't the behavior when running it natively under Windows, I'm
> assuming that the issue is related to PCI passthrough but it's
> difficult to be certain since I'm not seeing any errors beyond the
> capture applications not being able to find the device.
>
I think you need to find out if the problem follows the program,
the card, or the passthrough thingie. For instance, is there any other
program you can run to see if it sees the card? If you can't think of
anything, you could run a, say, ubuntu/fedora livecd (start you vm
client and tell it to boot from iso) and see if it can see and use the
card.
> Some details on my setup: i7-2600 running on a Q77 motherboard with VT
> -d enabled in bios. I'm running Debian Linux (testing) with qemu-kvm
> 1:2.4+dfsg-3 and am passing intel_iommu=on as a kernel parameter on
> boot. These are the main details I can think of to share, but if there
> is any additional info that would be useful, please let me know and
> I'll be happy to provide it.
>
> Having read through a few different posts around the 'net on how to do
> PCI passthrough (pretty much everything I've found was discussing GPUs,
> and almost always on a different distro), the only thing that jumps out
> as a potential problem is that the card in question does not appear to
> support FLR. However, I'm not clear if that's an absolute requirement
> for PCI passthrough or something that is specific to GPU support?
> Beyond that, I'm at a loss as to what the issue could be...
>
> Thanks,
> Phil
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