[vfio-users] Trouble passing through USB Root Hub

[Jonathan Scruggs]

Hi,

However, just passing through the sound card causes static noises, so I
want to pass through the controller that it's on. I heard that works better
for USB sound cards. I just don't know which controller is which and can't
determine which USB root hub is the right one to pass through.

Thanks,
Jon

On 21 September 2015 at 11:47, Blank Field <ihatethisfield at gmail.com> wrote:

> You wanted to attach a full usb controller or what?
> Usual virt-manager GUI passes through the USB device using only
> vendor-device id pair.
> On Sep 21, 2015 1:44 PM, "Jonathan Scruggs" <j.scruggs at gmail.com> wrote:
>
>> Hi,
>>
>> I have a USB audio card that makes static noises when passed through.
>> This is a known issue here, so I thought to pass through the whole USB Root
>> Hub to the VM.
>>
>> My system lists three USB Root hubs 2x EHCI and 1x XHCI ones when doing
>> lspci.
>>
>> The issue is that no matter what port I plug a device in, it always shows
>> up under the same root hub when using either USB Viewer or lsusb. Though,
>> lsusb shows me as having four root hubs, but lspci only lists three. How
>> can I tell what root hub a device is really plugged into so I can pass it
>> through to the VM?
>>
>> Thanks,
>> Jon
>>
>> _______________________________________________
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>> vfio-users at redhat.com
>> https://www.redhat.com/mailman/listinfo/vfio-users
>>
>>
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