Not sure if this belongs in libvirt or virt-manager, but filing it here anyway.

Once I have xenner installed, virt-manager will allow me to create a paravirt
guest with the hypvervisor of kvm.  However when I get to the very end and click
to actually bring up the guest I get a traceback as shown:

Unable to complete install '<class 'libvirt.libvirtError'>
virDomainCreateLinux() failed internal error unsupported input bus ps2
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/create.py", line 651, in do_install
    dom = guest.start_install(False, meter = meter)
  File "/usr/lib/python2.5/site-packages/virtinst/Guest.py", line 845, in
start_install
    return self._do_install(consolecb, meter)
  File "/usr/lib/python2.5/site-packages/virtinst/Guest.py", line 866, in
_do_install
    self.domain = self.conn.createLinux(install_xml, 0)
  File "/usr/lib64/python2.5/site-packages/libvirt.py", line 841, in createLinux
    if ret is None:raise libvirtError('virDomainCreateLinux() failed', conn=self)
libvirtError: virDomainCreateLinux() failed internal error unsupported input bus ps2
'

This is when trying to bring up a RHEL5 xen x86_64 guest.