I've installed Fedora 7, Xen 3.1 (from source), and virt-manager 0.4 (from rpms). The machine is VMX/VT-x capable. I have managed to build and run a paravirtualized Linux guest just fine. Now I want to build an HVM Linux guest, but virt-manager tells me "unable to open a connection to the Xen hypervisor/daemon." I've confirmed that both xend and libvirtd are running. Here are the error details: ------------------->8------------------ Unable to open connection to hypervisor URI 'xen': <class '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/python2.5/site-packages/libvirt.py", line 109, in openReadOnly if ret is None:raise libvirtError('virConnectOpenReadOnly() failed') libvirtError: virConnectOpenReadOnly() failed -------------------8<------------------ Can anyone see what I'm missing or what's broken? If not, what should I do next to debug or fix this? Thanks, Steve Brueckner, ATC-NY