i got my mac pro two days ago. i set the display to automatically go to sleep after 20 minutes, and the computer to NOT go to sleep at all. i woke up this morning and the display was sleeping like it should, but when i hit a key on the wireless apple keyword to wake it, nothing happened. and i tried clicking the wired mouse too. nothing. i had to shut the computer down by holding the power button. i let it sleep again when it came back up and then hit a key, and it woke. anyone know why it would do this and not wake? the display was sleeping for probably ~6 hours.