I have Fedora 11 and trying to get Xen working (which I think it is already) but the Virtual Machine Manager cannot find the hypervisor.
When starting Virtual Machine Manager, I receive the following error
Error determining default hypervisor. Could not populate a default connection. Make sure the appropriate virtualization packages are installed (kvm, qemu, etc.) and that libvirtd has been restarted to notice the change. A hypervisor connection can be manually added via File -> Add Connection
I've restarted libvirtd a few times and tried connecting manually but can't work it out.
Some useful information:
# lsof | grep xen
libvirtd 2962 root mem REG 253,0 19776 13379 /usr/lib/libxenstore.so.3.0.0
# service libvirtd status
libvirtd (pid 2962) is running...