From fresh installation (OS=XPMCE and MP=0.2.3.0RC1+SVN) all worked fine.
After some config changes in TVE3 I had the same problem again:
- manual suspend worked, then wake up worked
- going to standby with Power Scheduler, no wake up
I've tried to figure out what my config changes in TVE3 were and found the following:
- if I don't set the option "reinitialize MP (and tunercard) after standby" (sorry don't know how this option is called in english, 'cause using a german MP) everyting works fine for me
- if I set this option this above-named strange behavior occurs again
I'm not sure if this is typical for my hardware config, but maybe is a hint for you.