[Qemu-devel] Guest OS hangs on usb_add

[Timothy Jones]

I am trying to attach universal remote control (URC MX-950) to Windows
XP guest as follows:

==============================
(qemu) info usbhost
  Device 1.1, speed 480 Mb/s
    Hub: USB device 1d6b:0002, EHCI Host Controller
  Device 2.1, speed 480 Mb/s
    Hub: USB device 1d6b:0002, EHCI Host Controller
  Device 1.2, speed 480 Mb/s
    Hub: USB device 8087:0020
  Device 2.2, speed 480 Mb/s
    Hub: USB device 8087:0020
  Device 1.3, speed 480 Mb/s
    Class ef: USB device 0c45:6416, Laptop_Integrated_Webcam_2M
  Device 2.5, speed 12 Mb/s
    Vendor Specific: USB device 4647:3000     <-------- MX-950 USB remote
  Device 2.4, speed 1.5 Mb/s
    Class 00: USB device 05ac:0304, Apple Optical USB Mouse

(qemu) usb_add host:4647:3000

usb_create: no bus specified, using "usb.0" for "usb-host"
husb: open device 2.5
==============================

The guest just freezes including the monitor and pegs one of the cores
on host OS at 100%.

I tried the same with 2 other devices on the above list (Apple Mouse
and Webcam) and both worked fine.

I am running: (qemu) info version
0.12.50 (qemu-kvm-devel)

Host: Linux studio 2.6.34-gentoo-r1 #2 SMP Tue Jun 22 23:21:18 EDT
2010 x86_64 Intel(R) Core(TM) i5 CPU M 520 @ 2.40GHz GenuineIntel
GNU/Linux

Guest: Windows XP Pro SP3

FWIW, I tried the above with and without kvm and kvm-intel modules loaded.

Anybody know what could be causing this?

Thank you.

-TJ