Second monitor not waking from sleep

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http://forums.fedoraforum.org – I have a 13" MBP running Fedora 18. When the systems goes into powersave mode and shuts off the display (which I would like it to do after a period of time), the laptop screen wakes from sleep, but the 30" external monitor does not. If I unplug the monitor and plug it back in it restores the display. Not a major issue, but a bit of an on-going annoyance. Anyone else experiencing this? (HowTos)