[Mikuro]

For months, I've had problems with OS X's auto-sleep feature. 99% of the time these days, it simply doesn't work. It seems like the problem has had several causes over the months, because at one point I was fairly sure it was iTunes, but that's clearly not the case now.

I've tried narrowing down the cause, but I'm at a loss. It's not iTunes, Activity Monitor, iChat, Safari, Gee, or any other "likely" suspect. The only visible app that's been loaded through all my tests is the Finder. Nothing appears wrong when I look at Activity Monitor, either. The only processes using up time when idling are pmTool and kernel_task, both of which are system processes that, AFAIK, I have no control over.

Any idea how I might fix this? And are their any smart third-party auto-sleep programs out there I could use instead?

Manual sleeping works just fine, but it's not really practical.