Mac Pro will boot when I wake it up from sleep

have you installed any new programs or hardware or has anyone but you used the machine lately it might be a power setting that has changed for some strange reason

 

Check the Console logs. There may be a hint there.

 

Same problem, too it to the "apple bar" and got told, "It's old"

Will call up apple on the phone tuesday and ask them to fix it, as it's actually really annoying now. I've turned off auto-sleep and the problem is bypassed.

I'll update you with more info after tuesday.

 

Same machine and I've never had that problem. I'm assuming you meant it (re)boots rather than simply waking from its slumber.

My problem is much more sinister, however. I lose the ability to use my optical drive if my machine goes to sleep and wake. It's like it's not there at all and I need to reboot. I've traced it back to Snow/Leopard since this wasn't a problem with Tiger.

 

Not saying this will fix your problems, but I have found that repairing permissions and running the maintenance scripts has fixed a lot of weird problems for me. Just a thought.

 

You need to reset the SMC.

http://support.apple.com/kb/ht3964

 

That type of answer is totally unacceptably. You should speak to that persons boss or email Steve Jobs.

 

I had the same problem with my 08 mac pro at the beginning. The issue seemed to be related to the video card (HD 2600XT). A firmware update for it (it was released a couple of months after the MP) fixed the problem in my case... You could try to find that update or install another GFX card if you are working with the 2600 at the moment.

 

Ditto. But IMO it has been an EFI firmware issue. Installing Firmware Version MP31.006C.B05 http://support.apple.com/kb/DL95 fixed it for me.

 

I did, and an apple repair person came to my house, replaced the motherboard and power supply fixing the problem.

 

That's impossible. As the 2008 machines came with Leopard.