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On Fri, Jul 01, 2016 at 09:27:47AM +0200, Alex wrote:
> Hello everybody,
> I'm testing the new USB passthrough functions in Qubes 3.2 rc1, namely
> I'm trying to pass a whole Android smartphone to an AppVM (a cube? :).
>
> I can see it in dom0 with qvm-usb, and I tried to pass it with a naïve
> command line like:
> $ qvm-usb -a work dom0:1-4
>
> Problem is, the operation fails (ERROR: Device attach failed). Adding a
> couple lines in qubesutils.py tells me that the call to
> vm.run_service('qubes.USBAttach') on line 621 fails with error code 1.
>
> Should I expect the USB passthrough of an Android smartphone to work? If
> this is the case, how can I further debug this failure?
Are you sure you have qubes-usb-proxy package available in both source
and target VM?
If so, take a look at logs in both VMs (`sudo journalctl`) for more
details.
On my system it looks like phone simulate disconnect + connect each time
the driver is unbound from it (which is needed also during USB
passthrough...).
It looks like this:
[root@sys-usb devices]# ls -l /sys/bus/usb/devices/3-1.2/driver
lrwxrwxrwx 1 root root 0 Jul 1 09:48 /sys/bus/usb/devices/3-1.2/driver
-> ../../../../../../../bus/usb/drivers/usb
[root@sys-usb devices]# echo 3-1.2 > /sys/bus/usb/drivers/usb/unbind
Jul 01 09:50:23 sys-usb kernel: usb 3-1.2: USB disconnect, device number
11
Jul 01 09:50:23 sys-usb kernel: usb 3-1.2: new high-speed USB device
number 12 using ehci-pci
(...)
Unfortunately, this makes it incompatible with USB passthrough. Maybe
there is a way to prevent such behaviour? Or prevent attaching "usb"
driver initially, so it will not be necessary to unbind it?
- --
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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