On Wednesday, October 31, 2018 at 3:08:42 PM UTC+1, [email protected] wrote:
> On Wednesday, October 31, 2018 at 12:35:27 PM UTC+1, awokd wrote:
> > tfm853 via qubes-users wrote on 10/30/18 8:30 PM:
> > > I'm trying to use a C920 USB camera on a Thinkpad X1 Carbon 6gen, latest 
> > > Qubes4. The VM is running debian-9, but i also tried fedora-26. I tried 
> > > both connecting the camera directly to a USB port of the Thinkpad and via 
> > > a powered USB hub.
> > 
> > > 
> > > Qubes shows the device as still being attached to the VM. I can detach 
> > > and reattach without problems.
> > > 
> > > Forwarding the Thinkpad's internal camera works fine.
> > > 
> > > Are failures with particular USB devices to be expected? Does anyone know 
> > > a good external webcam that works?
> > > 
> > 
> > Yes, some devices don't work well through redirect. If you have a spare 
> > USB controller (not in use for your mouse & keyboard) you can assign it 
> > directly to the VM and then connect the webcam, but you lose isolation 
> > between that controller and the VM.
> 
> dom0:00_14.0  USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI 
> Controller                                                sys-usb 
> (no-strict-reset=True)
> dom0:3b_00.0  USB controller: Intel Corporation JHL6540 Thunderbolt 3 USB 
> Controller (C step) [Alpine Ridge 4C 2016]
> 
> Would it be possible to use the thunderbolt controller for that purpose? It 
> doesn't seem to be used right now.

Unfortunately, this doesn't work. If I plug a USB device with an USB-C adapter 
to the USB-C port of the laptop, the device still shows up the first controller.

I don't know what the second controller does.

So the original question remains: Does anyone know a good external webcam that 
will work with USB forwarding?

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