Hello,

I am running Qubes 3.2, with a Fedora 25 sys-usb.  I have a HackRF One SDR that 
I am trying to attach to an appvm, with no luck.

When I run qvm-usb in dom0 to attach the USB device the command hangs and there 
is the following in the appvm's dmesg output:

[  490.254687] vhci_hcd vhci_hcd: pdev(0) rhport(0) sockfd(0)
[  490.254701] vhci_hcd vhci_hcd: devid(131091) speed(3) speed_str(high-speed)
[  490.463076] usb 2-1: new high-speed USB device number 93 using vhci_hcd
[  490.674105] usb 2-1: new high-speed USB device number 94 using vhci_hcd
[  490.885282] usb 2-1: new high-speed USB device number 95 using vhci_hcd
[  490.885332] usb 2-1: SetAddress Request (95) to port 0
[  490.900735] usb 2-1: device descriptor read/8, error -71
[  491.022552] usb 2-1: device descriptor read/8, error -71
[  492.007163] usb usb2-port1: Cannot enable. Maybe the USB cable is bad?
[  492.007176] usb usb2-port1: unable to enumerate USB device
[  492.991256] usb usb2-port1: Cannot enable. Maybe the USB cable is bad?
[  493.879245] usb usb2-port1: Cannot enable. Maybe the USB cable is bad?

The last message continues for some time before vhci_hcd gives up and 
disconnects the device.  qvm-usb in dom0 never returns.

The SDR works just fine if I use it from sys-usb directly, so the problem 
appears limited to how Qubes handles USB forwarding.

Can anyone help with this error?

I suspect not many people have an SDR to test.  I am willing to help debug this 
but I will need help knowing what to do.

Thanks,
- Paul

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