Unable to open connection to hypervisor URI 'qemu:///system':
libvirt.libvirtError virConnectOpenReadOnly() failed
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/engine.py", line 68, in _connect_to_uri
    conn = self.get_connection(uri, readOnly)
  File "/usr/share/virt-manager/virtManager/engine.py", line 309, in get_connection
    conn = vmmConnection(self.get_config(), uri, readOnly)
  File "/usr/share/virt-manager/virtManager/connection.py", line 74, in __init__
    self.vmm = libvirt.openReadOnly(openURI)
  File "/usr/lib/python2.4/site-packages/libvirt.py", line 109, in openReadOnly
    if ret is None:raise libvirtError('virConnectOpenReadOnly() failed')
libvirtError: virConnectOpenReadOnly() failed