When attaching a USB device from a new, disposable &
minimal-template-based, sys-usb, I get the following error:

user@dom0 ~]$ qvm-usb attach disp6xx5 sys-usb-dvm:2-2
> Device attach failed: No device info received, connection failed, check
> backend side for details
>

I'm not sure where to look for logs or error output on the "backend side".
Can anyone shed some light on this?

When I looked in the source code I can see the error comes from
qubes-app-linux-usb-proxy in the bash shell script "usb-import", line 101:

# check for unexpected EOF
> if [ -z "$untrusted_devid" -a -z "$untrusted_speed" ]; then
>     echo "No device info received, connection failed, check backend side
> for details" >&2
>     exit 1
> fi
>

But I'm not really sure at a higher level what's going on in those lines
and where I should look for the issue.

Thank you,
Matthew

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