Comment 6 for bug 1236525

OK - please see that this has a intermediary fix to it
https://code.launchpad.net/~ricmm/powerd/suspend-if-mir-alive/+merge/190173

closing this as i've added a blueprint to track feature dev effort of moving power policy from powerd to unity/mir here https://blueprints.launchpad.net/ubuntu/+spec/client-1404-unity-ui-windowmanager