Comment 7 for bug 639712

OK, I've tried the following:

1) Recompile kernel with all the same options except enabling DMAR.
2) Edit the apparmour profile to match suggested by flashydave
3) Installed latest qemu-kvm from kvm edgers ppa: https://launchpad.net/~ubuntu-server-edgers/+archive/server-edgers-qemu-kvm

Attached is the dmesg and log output.