Description of problem:
Trying to set up a Windows 7 VM across two physical monitors

Version-Release number of selected component (if applicable):
virt-manager-0.9.4-2.fc17.noarch
virt-manager-common-0.9.4-2.fc17.noarch
spice-gtk-python-0.12-5.fc17.x86_64
spice-vdagent-0.10.1-1.fc17.x86_64
spice-gtk3-0.12-5.fc17.x86_64
spice-glib-0.12-5.fc17.x86_64
spice-gtk-0.12-5.fc17.x86_64
spice-client-0.10.1-5.fc17.x86_64
spice-gtk-tools-0.12-5.fc17.x86_64
spice-xpi-2.7-2.fc17.x86_64
spice-server-0.10.1-5.fc17.x86_64
libvirt-daemon-config-nwfilter-0.9.11.7-1.fc17.x86_64
libvirt-python-0.9.11.7-1.fc17.x86_64
libvirt-daemon-config-network-0.9.11.7-1.fc17.x86_64
libvirt-daemon-lxc-0.9.11.7-1.fc17.x86_64
libvirt-daemon-0.9.11.7-1.fc17.x86_64
libvirt-client-0.9.11.7-1.fc17.x86_64
libvirt-0.9.11.7-1.fc17.x86_64

Windows Device driver:
Red Hat QXL GPU
QXL 6.1.0.10012
Date: 05/10/2012
Signed by Red Hat, Inc

How reproducible:
Steps to Reproduce:
I have this host XML file in libvirtd/qemu:

<!--
WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE
OVERWRITTEN AND LOST. Changes to this xml configuration should be made using:
  virsh edit Windows7
or other application using the libvirt API.
-->

<domain type='kvm'>
  <name>Windows7</name>
  <uuid>36e52831-d8b3-e780-43f8-5fc6b95dd0b7</uuid>
  <memory unit='KiB'>2097152</memory>
  <currentMemory unit='KiB'>2097152</currentMemory>
  <vcpu>2</vcpu>
  <os>
    <type arch='x86_64' machine='pc-0.15'>hvm</type>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
    <pae/>
  </features>
  <clock offset='localtime'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-kvm</emulator>
    <disk type='block' device='disk'>
      <driver name='qemu' type='raw'/>
      <source dev='/dev/vg_lp000138/Windows7'/>
      <target dev='vda' bus='virtio'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
    </disk>
    <controller type='virtio-serial' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </controller>
    <controller type='usb' index='0' model='ich9-ehci1'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x7'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci1'>
      <master startport='0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0' multifunction='on'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci2'>
      <master startport='2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x1'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci3'>
      <master startport='4'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x2'/>
    </controller>
    <controller type='ide' index='0'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
    </controller>
    <interface type='network'>
      <mac address='52:54:00:99:60:5d'/>
      <source network='default'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <target port='0'/>
    </serial>
    <console type='pty'>
      <target type='serial' port='0'/>
    </console>
    <channel type='spicevmc'>
      <target type='virtio' name='com.redhat.spice.0'/>
      <address type='virtio-serial' controller='0' bus='0' port='2'/>
    </channel>
    <input type='tablet' bus='usb'/>
    <input type='mouse' bus='ps2'/>
    <graphics type='spice' autoport='yes' listen='0.0.0.0'>
      <listen type='address' address='0.0.0.0'/>
    </graphics>
    <graphics type='spice' autoport='yes' listen='0.0.0.0'>
      <listen type='address' address='0.0.0.0'/>
    </graphics>
    <sound model='ich6'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </sound>
    <video>
      <model type='qxl' vram='131072' heads='2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <redirdev bus='usb' type='spicevmc'>
    </redirdev>
    <redirdev bus='usb' type='spicevmc'>
    </redirdev>
    <redirdev bus='usb' type='spicevmc'>
    </redirdev>
    <memballoon model='virtio'>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
    </memballoon>
  </devices>
</domain>

  
Actual results:
Error starting domain: internal error only 1 graphics device is supported:

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 96, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 117, in tmpcb
    callback(*args, **kwargs)
  File "/usr/share/virt-manager/virtManager/domain.py", line 1090, in startup
    self._backend.create()
  File "/usr/lib64/python2.7/site-packages/libvirt.py", line 554, in create
    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
libvirtError: internal error only 1 graphics device is supported


Expected results:
Monitor A and B to have an extended Windows 7 desktop.

Not sure what I am doing wrong.

Additional info:
uname-a
nexus.qwert.com 3.6.8-2.fc17.x86_64 #1 SMP Tue Nov 27 19:35:02 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux