[grayware]

I have a 15-in Powerbook running 10.4.9 and very frequently (every 10 minutes or so?) it will awaken by itself. The lid's LED goes off and a cycling sound -- the drive I assume -- originating near the power button is emitted, a sound just like when you manually open the cover. It will then go back to sleep in a couple minutes. I rarely shut the machine down when it's not in use. I've repaired permissions.

What's the cause of this and how can I correct this nocturnal behavior?

[mfbernstein]

Is this behavior new with 10.4.9?

In general, waking has many possible causes. USB events, the lid-closed sensor being moved, mouse events, network events, Bluetooth, etc. etc. Assuming none of these apply in your case, it could just be something b0rked with the system.

A not-so-elegant solution is to play around with the pmset command. Disable the various wake-up options until your system works as desired, then reenable them one-by-one.

[grayware]

Thanks. I tried the simplest thing first: unplugging the cordless USB mouse's plug and that seemed to send it into deep, deep sleep.