OK, went back to stock 10.10 kernel. All problems solved, it seemed. Sorry for the noise. Case closed.
** Changed in: libvirt (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to libvirt in ubuntu. https://bugs.launchpad.net/bugs/734777 Title: "cannot acquire state change lock" problems -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs