Comment 28 for bug 734777

Got a chance to play with this again for a few minutes. If I
login and halt a vm or do a Shut Down from virt-manager this
consistently hangs virt-manager and the vnc client window.

If I do a "service restart libvirtd" virt-manager is able to
re-connect again. I do not have to remove any /var/run/libvirt*
files.

I have been running 2 virtual machines for over a year. I just
noticed this problem because I created a new machine and started
seeing virt-manager hanging with the "Timed out during operation: cannot acquire state change lock" error.

Hope an update comes out soon.