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On Thu, Aug 04, 2016 at 02:02:59PM +0000, 46l47g+27idcs742td9g via qubes-users
wrote:
> Hi,
>
> I finally managed to put this to work, the missing part was to install the
> qubes-usb-proxy also on the sys-usb as well (mea culpa) :)
> I'm now able to attach the webcam to any AppVM, unfortunately the only caveat
> is that when I unassigned the device from the AppVM back to the sys-usb I'm
> not able to get the camera working again on the sys-usb - the device doesn't
> seem to be present.
Indeed this is how it is working now. Mostly
because device is still connected to usbip-host driver and isn't
switched back to the original one.
> Is this the expected behavior?
That's a good question. I think the most common use case would be to
either:
- use device directly in sys-usb all the time - for example if you use
a different mechanism to make it available to other VMs - like
qvm-block, or simply mount it there and copy to/from files using
qubes file copy
- don't use it in sys-usb at all and only attach to some VM when needed
- like for webcam - you don't have your video call credentials in
sys-usb, but in some other dedicated VM
Generally it is based on assumption that sys-usb serves only as an
interface to the devices, but all the data is stored in some AppVM.
If this is correct, switching device driver back to the original one is
just waste of time.
Joanna, Andrew, what do you think?
- --
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
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