This sounds like you need to adjust the libvirtd apparmor profile.
Edit
/etc/apparmor.d/abstractions/libvirt-qemu
and add the following line:/usr/bin/kvm-balloon rmix, -- kvm memory ballooning is unusable in Lucid https://bugs.launchpad.net/bugs/579723 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
