I've never done what you want before, but
I just tried this and it worked for me...the
task triggered on a wake up.
Set up the task trigger to begin on "On an Event"
Create a "Custom Event Filter" with
Event Level: "Information"
Event ID: 1 (The system has resumed from sleep)
Below is my screen print for the Custom Event Filter
I set up my test to run WMP...
Depending on what your
task needs to do, there may be more to it such as security/permissions considerations.
I don't know if there are any more event-id's for "wake up"...i see event id 1 for my last wake up...
If the approach suggested by Saintor will work for you, that may be simpler.