virt-manager-0.8.0-2.fc12.noarch I am using the rawhide virt-manager and have set up an ssh connection to a RHEL 5.4 host. When the RHEL 5.4 host reboots or powers off I am unable to close the virt-manager window. If I click on the X after a while the gnome 'force quit' dialog comes up and I am able to close the application that way. I should be able to close virt-manager even when it has an active ssh connection to a host that disappeared.
I can't reproduce here. The connection just goes to "Not connected" for me Maybe it's specific to a 5.4 host It sounds very similar to bug #517778 ... can you confirm whether it's a duplicate? Did you have a (VNC) VM console open at the time?
*** This bug has been marked as a duplicate of bug 517778 ***