Comment 7 for bug 673705

This sounds most like comments #2 and #16 in bug 584048.

It can't be bug #579892, because that patch is in maverick.

Do you have wicd or network-manager running?

Can you give the output of:

   iptables -L?
   cat /etc/network/interfaces
   cat /proc/net/arp (both before and during a network freeze)

Also, could you follow the recipe at https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/616064/comments/33 ? That should determine whether this is a kernel or libvirt/qemu bug.

thanks,
-serge