Hello all, I am running a MacBook Pro (15 "CD 2.0) as my main computer. I realized yesterday that my computer has not voluntarily gone into sleep mode/dimmed the screen/shut off the LCD when idle even though the Energy settings say it is set to blank screen after 3 minutes and sleep after 10. Here's a quick synopsis: -I don't have any applications running besides the obvious core applications and services. -I'm not sure when exactly this started malfunctioning--the only thing I have done to the computer worth mentioning is the latest EFI update (however it did work fine after the update still). My power management settings have been locked since I set them on here, and they aren't changing (i.e. through some other application). -Apple Menu->Sleep works just fine -Computer sleeps when lid is shut (and wakes up fine when lid is opened) This has really baffled me. I'd like to figure out how to fix this problem since I really can only leave my computer unplugged for 3-4 hours now (rather than being able to leave it on and just let it auto-sleep when I'm not using it which normally lasts me my working day when I am without a power cord.) I am very knowledgeable with computers (longtime Unix user and administrator here), but I really don't know how the Macintosh manages this kind of thing. Any advice would be greatly appreciated! Thanks in advance.