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 Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/734777 Title: "cannot acquire state change lock" problems -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs