On 03/08/2018 02:12 PM, Ed wrote:
> [...]
> 
> Are you passing the device through to another VM?
> 
> The USB pass-through method has given me issues in the past for devices
> that use a lot of bandwidth (webcams), though you are saying data is
> lost after only a few bytes, I still might be suspect of the USB
> passthrough system in qubes...
> 
> So if you ARE passing through you might want to try running the scanner
> software directly from sys-usb to see if you can eliminate the USB
> passthrough as a source of problems.

Oh, I thought it was a hardware issue, but did hit the same issue (on
R3.2, haven't tried R4 yet). FWIW, [1] references this issue along with
a potential workaround.

That said, running still more things in sys-usb just increases once
again the attack surface to sys-usb, which is already way too high imo,
so that workaround isn't perfect…


[1] https://github.com/QubesOS/qubes-issues/issues/2594

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