[fedora-virt] USB devices get reset a few seconds after attaching them to guest and then get binded to host

[Stewart Adam]

Hi,

I have been attempting to attach a USB keyboard & mouse from the host to a 
Windows 7 guest using QEMU's USB2 controller. The keyboard seems to attach 
correctly, however I have trouble with certain mice and devices. When 
starting the guest, the devices remain attached for a second or two, then 
they disconnect. the libvirt logs show that it no longer sees the USB 
device, and I see this in dmesg:

[   10.876071] usb 3-13: reset full-speed USB device number 2 using xhci_hcd
[   10.888206] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with 
disabled ep ffff88041917f740
[   10.888209] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with 
disabled ep ffff88041917f800
[   10.888210] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with 
disabled ep ffff88041917f7c0
[   11.041209] usb 3-14: reset full-speed USB device number 3 using xhci_hcd
[   11.054379] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with 
disabled ep ffff8800c8d559c0
[   11.054383] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with 
disabled ep ffff8800c8d55440
<repeats for some time>
[   87.476806] usb 3-14: new full-speed USB device number 4 using xhci_hcd
[   87.491908] usb 3-14: New USB device found, idVendor=046d, idProduct=c066
[   87.491911] usb 3-14: New USB device strings: Mfr=1, Product=2, 
SerialNumber=3
[   87.491912] usb 3-14: Product: G9x Laser Mouse
[   87.491914] usb 3-14: Manufacturer: Logitech
[   87.491914] usb 3-14: SerialNumber: 081BB92CA70018
[   87.494697] input: Logitech G9x Laser Mouse as 
/devices/pci0000:00/0000:00:14.0/usb3/3-14/3-14:1.0/input/input16
[   87.494994] hid-generic 0003:046D:C066.0008: input,hidraw0: USB HID v1.11 
Mouse [Logitech G9x Laser Mouse] on usb-0000:00:14.0-14/input0
[   87.498834] input: Logitech G9x Laser Mouse as 
/devices/pci0000:00/0000:00:14.0/usb3/3-14/3-14:1.1/input/input17
[   87.499078] hid-generic 0003:046D:C066.0009: input,hiddev0,hidraw1: USB 
HID v1.11 Keyboard [Logitech G9x Laser Mouse] on usb-0000:00:14.0-14/input1

As you can see the device re-attaches to the host. The device is plugged 
into a USB2 port, but it appears to be controlled by Intel's XHCI controller:
00:14.0 USB controller [0c03]: Intel Corporation 8 Series/C220 Series 
Chipset Family USB xHCI [8086:8c31] (rev 04)

I'm running 3.12.5-303.fc20.x86_64, which is Fedora 20's 
kernel-3.12.5-302.fc20.x86_64 with the i915 VGA arbitration patches applied. 
Should I report a bug against the kernel?

Regards,
Stewart