[LagunaSol]

With both my previous PowerMacs (G4 533 and a B&W G3 300), my Sonnet IDE card prevented deep sleep, so I was never able to use it.

On my new machine (Dual-867), I have no such limitation. But I'm not entirely sure how it works.

Of course I can put the machine to sleep via the sleep menu, which shuts everything down, including the fans.

I have my Energy Saver set to put the machine to sleep after 20 minutes of inactivity. However, rarely does this result in "deep sleep" with the fans off. Sometimes it does, sometimes it does not. What prevents deep sleep from occurring within the Energy Saver function? Do I need to quit all applications? Are there certain applications which, if left running, will prevent deep sleep? How about the Mail application? Does its automatic mail check every 5 minutes prevent deep sleep?

Any enlightenment would be appreciated.

P.S. I love my new machine. How could anyone gripe that a dual-867 G4 with dual-opticals and IDE for 4 drives for $1700 not be a great deal (at least in the Mac world)?

[Camelot]

In Deep Sleep mode, the Mac essentially powers down everything possible including network interfaces, drive buses, etc.

Some PCI cards (including your Sonnet card) don't support deep sleep mode, and therefore prevent the Mac from going into deep sleep.

In addition to PCI cards, though, some applications can prevent your system from going into deep sleep. That's because they periodically cause activity that resets the system's idle timer, making it think it's still active and therefore not able to go to sleep. Typical culprits are filesharing, and any type of server.

Check which server-type applications are running. Try turning them off one by one until you find the one(s) that prevent the system from sleeping, then decide if you need to have them running.

[Aussie John]

I dont have any sharing services turned on and my computer still wont automatically sleep. I have even turned of Apple Talk. It used to work in 10.1

I think implimation is still a bit flaky.