libvirt users - Jan 2012 - libvirt-bin always hung

I have installed libvirt-bin in my ubuntu 11.10
libvirt-bin version is 0.9.2.-4 ubuntu15.1

But running after a time, it is always hung. It is not response if I use
"virt" . And openstack using libvirt too, it also does not work.


???????????????

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