USB Host Device passthrought [Host --> Guest] is not working

[Gannet]

I'm trying to passthrough USB Flash drive from Host to Guest with virt-manager with no success.

1. I'm starting virt-manager.
2. Putting my USB Flash drive into USB port.
3. Adding USB Host Device with my USB Flash drive. It appears in hardware list as USB 090c:1000 device.
4. I'm starting my VM and when it is finished no usb device I can see in my guest: lsusb doesn't shows it.
-------------------
I tried another way. When VM is started I executed:

$ sudo virt-xml Kubuntu-16.04.x-x86_64-14GiB --update --add-device --host-device 090c:1000
Для пристрою успішно виконано дію hotplug.
Домен «Kubuntu-16.04.x-x86_64-14GiB» успішно визначено.

But nothing's changed in guest system: no any new device appeared.
-------------------
I tried also:
1. Creating usbhostdev.xml file with the following content:

<hostdev mode='subsystem' type='usb'>
        <source>
                <vendor id='0x090c'/>
                <product id='0x1000'/>
        </source>
</hostdev>

2. $ sudo virsh attach-device Kubuntu-16.04.x-x86_64-14GiB /tmp/usbhostdev.xml

This also added USB 090c:1000 device in virt-manager but nothing's changed is guest system again.

I think this is a bug or something I'm doing wrong possibly.

Some additional info:
Host: Kubuntu 16.04 LTS
Linux: 4.7.0-040700rc7-generic x86_64
libvirt-bin: 1.3.1-1ubuntu10.1
qemu-system-x86: 2.5+dfsg-5ubuntu10.2

Guest: Kubuntu 16.04 LTS / Windows 7 x64
Linux: 4.4.0-28-generic x86_64

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: virt-manager 1:1.3.2-3ubuntu1.16.04.1
Uname: Linux 4.7.0-040700rc7-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: KDE
Date: Fri Jul 15 22:40:58 2016
InstallationDate: Installed on 2014-06-08 (768 days ago)
InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.1)
PackageArchitecture: all
SourcePackage: virt-manager
UpgradeStatus: Upgraded to xenial on 2016-02-04 (161 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Gannet (ken20001)]

Also I've tried 'virt-manager --debug' and adding USB Host Device. It seems output shows all is correct (http://pastebin.ubuntu.com/19548401/):

[сб, 16 лип 2016 00:21:58 virt-manager 26388] DEBUG (addhardware:124) Showing addhw
[сб, 16 лип 2016 00:22:14 virt-manager 26388] DEBUG (addhardware:1280) Running setup() for device=<virtinst.devicehostdev.VirtualHostDevice object at 0x7f92f40d2ed0>
[сб, 16 лип 2016 00:22:14 virt-manager 26388] DEBUG (addhardware:1282) Device setup() complete
[сб, 16 лип 2016 00:22:14 virt-manager 26388] DEBUG (addhardware:1295) Adding device:
<hostdev mode="subsystem" type="usb" managed="yes">
  <source>
    <vendor id="0x090c"/>
    <product id="0x1000"/>
  </source>
</hostdev>

[сб, 16 лип 2016 00:22:14 virt-manager 26388] DEBUG (domain:1014) attach_device with xml=
<hostdev mode="subsystem" type="usb" managed="yes">
  <source>
    <vendor id="0x090c"/>
    <product id="0x1000"/>
  </source>
</hostdev>

[сб, 16 лип 2016 00:22:14 virt-manager 26388] DEBUG (libvirtobject:74) Redefining <vmmDomain name=Kubuntu-16.04.x-x86_64-14GiB> with XML diff:
--- Original XML
+++ New XML
@@ -111,5 +111,11 @@
     <memballoon model="virtio">
       <address type="pci" domain="0x0000" bus="0x02" slot="0x06" function="0x0"/>
     </memballoon>
+ <hostdev mode="subsystem" type="usb" managed="yes">
+ <source>
+ <vendor id="0x090c"/>
+ <product id="0x1000"/>
+ </source>
+ </hostdev>
   </devices>
 </domain>

[сб, 16 лип 2016 00:22:14 virt-manager 26388] DEBUG (addhardware:134) Closing addhw

But anyway the device doesn't appeared in guest.

[Daedra (daedra-86)]

Greetings!
I take ~jacob/+archive/ubuntu/virtualisationrepository in Ubuntu 16.04.
The problem with usb passthrought.
Through virt-manager add a usb mouse/keyboard, run the virtual machine, and the vm does not see them.
Then I pull them out of the USB port, re-insert through virt-manager add a usb mouse/keyboard, and now vm sees them.
After turning off the vm, repeated all over again.
I do not know to whom to address this problem.
Thank you.