I am running a home server with a VM on it, and I am trying to be power conscience.  Basically, I want the home server to be able to sleep and wake on LAN.  Additionally, the guest OS may be doing activity for which it demands the physical machine not sleep (for example, playing video is a common task which often prevents a machine from sleeping).  Finally, the guest OS may also occasionally register sleep wake timer events so that the physical machine will need to wake up from sleep.  Essentially, I want to the host machine to be able to configure the power settings, but also be mindful of the applications running within the guest.

Is such a configuration even possible?

Thanks