Dual Quad-core Mac Pro reboots from sleep

I've read about problems with Energy Saver, but didn't realize there is now an option (again, from G5 days?) for processors.

Something like "automatic, high, reduced" setting, AND some kind of sleep setting?

I've seen some threads on Parallels that would keep me away for now, and I'd wait for Fusion 1.2 or whatever. And how to fix it w/ firmware and OS patches?

I should have been more precise. The options are to sleep the whole computer (including processors and cards), the hard drives, or just the screen. So, there's not reduced power consumption setting for the processors independent of anything else.

As far as how this will get fixed? Who knows. I certainly HOPE it doesn't mean a new motherboard! My guess is that it's some software glitch that might get fixed in 10.5.2, or perhaps a machine-specific update...

Hey hey hey, count me in too. Brand new 3.O gHz, reboots upon hitting the keyboard after several hours asleep. Gonna try the advice given here.

netdog from the Mac Rumors forums suggests running this: FSCK -fy
in the console. Says that fixed the problem.

http://forums.macrumors.com/showthread.php?t=419733

You should always run FSCK after a hard restart, not to cure the issue with Mac Pro, but because of potential damage to the drive's directory.

And not from the terminal, but from single user mode command line.

Count me in. I have the same problem with the 2.8

I reset the PRAM and it seemed to fix the problem. Then a week later it happened again. This time I reset the SMC and PRAM and so far it has been sleeping just fine.

I hope all that is needed is a software/firmware update.

May as well add me to the list too- maybe with enough noise, Apple will offer a proper fix for the problem?

Again, I have brand new Mac Pro 2.8x8 with the same problem. I did the PRAM and SMC resets which seems to have fixed it for the time being, but I'd rather a proper fix than to have it happen again- unplugging everything is such an unnecessary inconvenience!

I'll just chime in to say that I have started experiencing this, right after adding 8GB of 3rd party memory. I'll try the PRAM and SMC resets and see if that fixes it.

Also try with just the 3rd party memory.
Could you mention where / what it is?

I have the same problem with MacPro 2.8 2x quadcore early 2008. When I wake up from sleep the MP reboots. I have only 2 Gb original RAM. An external FireWire HD (chip Oxford) is always connected to the MacPro. Power supply from an UPS.

Message was edited by: Redux

I thought my mac pro (8-core 2.8) was not prone to reboot by itself when awaken, but it did it today for the first time after a night of sleep...

phjo

Darn. I thought this wouldn't be a problem for myself, either, but my MP just did it for the first time a little while ago - also after an overnight sleep.

My MP has also been turning itself on every 24 hours at 4pm, but that's a totally separate (or is it?) issue...
http://discussions.apple.com/thread.jspa?threadID=1337262&tstart=15

Same Problem here, new MP 8 core 2,8 lots of firewire and usb stuff. NO additional RAM or other internal upgrades.
Reboots every time he was asleep over night.
I tried resetting the SMC and the PRAM, nothing works for me 😟

I hope Apple will fix this soon!

Oh, i´m not alone, nice to hear!
2,8 ghz, 2xquad. same problem. restarts after not working some hours.
my mac pro has just the built in RAM, no separate raid or something else.

I have the same problem, but with a small twist.

When the computer fails to wake up, it doesn't restart...it just hangs there. I hit the power button to turn it off then back on again and nothing...after a few minutes I get the blinking folder with a question mark.

To get back running again I turn off then back on holding option and I can select Mac HD and it boots fine.

I saw something mentioned somewhere else that I of course can't find again about samba playing a role, and I did start noticing this after setting up file sharing using SMB. Of course, I set that up the 3rd day of having the computer, so you can't really tell.

So, is everyone sharing folders via SMB? Is anyone not?

My quick workaround is to set the computer to never go to sleep, but it's not ideal of course.