http://discussions.apple.com/thread.jspa?messageID=8624869
port 6 on bus 0x4 : wake reason = OHC1 = keyboard
port 6 on bus 0x4 : wake reason = PWRB = Power button
port 2 on bus 0x6 : wake reason = OHC2 = mouse (usb next to Firewire 800 port)
port 1 on bus 0x4 : wake reason = OHC1= mouse (usb next to mini display port)
port 5 on bus 0x4 : wake reason = OHC1 = Apple remote
port 1 on bus 0x4 : wake reason = EC LID0 = Open lid
no port report : wake reason = OHC1 = change usb port
