Q: Dual Quad-core Mac Pro reboots from sleep

I am having this same exact issue. The 10.5.2 update did not fix the problem. I tried reseting the PRAM as suggested this morning. I will not know the outcome until I arrive home later this evening.

My system is pretty much factory other than the 500 gig SATA drive I added.

MAC PRO 2.8 8CX/2X1G/320/2600XT/SD-USA MA970LL/A
- USB devices: Apple Keyboard, Mighty Mouse, iPod docking cable (no ipod connected), and EyeTV 250 Plus

Someone, in this or another thread, said they have on-site support? and someone would be out to change out the logicboard and another component.

Seems like it is hardware issue, and that more recent models don't have it, and it will be interesting to see how this plays out.

I had previously reset the parameter RAM and done the SMC reset and got rid of the problem under 10.5.1. Unfortunately as soon as I updated to 10.5.2, it came back

same problem here. Error came back with 10.5.2
thanks, Apple.

Update: After the restart after sleep problem reoccurring after installing 10.5.2, I redid the resetting of the PRAM and SMC and the problem went away again.

Hatter, we'd be interested in that reference 'cause I don't think it was here. As of last Thurs Apple tried to have me drive 80 miles one way to have a genius look at it, but since the unit fell within the 14 day return period I insisted on a RMA instead. I've got 14 days from when I print the FedEx labels and soon as it happens again it's going back. But, the problem I'm having now is that the 5.2 update is not letting it sleep! Clever way to solve the problem, I thought.

Having same problem with my 2.8 octo. Reboots on wakeup sometimes. Its going back to the store.

Config: Early 2008 2x2.8G (8 core), 320G ST (original); 2x500G WD, 1x750G WD; 2x1G Ram (Original); 2x2G Ram (OWC), HD 2600, APC RS1500LCD

No video issues. Reboot after sleep of any duration, fixed by SMC and PRAM reset. Recurred after 10.5.2 update. Again fixed by SMC and PRAM reset.

- Caveat: Not extensive testing since I don't routinely sleep the machine.
- However, I believe this points to software or firmware issue...how could hardware problem be repaired by firmware resets?
- Side question...does anyone know what sort of thing could cause SMC and PRAM to require a reset (ie, cause of problems)?

Count me in too - though I found some interesting things trying;
Just got a brand-new 3.2 with 16GB RAM and the 8800GT Card.
Out of the box, installed 10.5.2 (before reading about the reboot on out-of-sleep issues).

Sure enough, it reboots when it comes out of sleep. NOTHING in the console / logs.

I have 3 1TB Seagate 7200.11 drives in there, and 16GB RAM (OWC). All 'test out' fine...

So I did a few tests - not sure this is representative yet as I have NOT had time to leave it sleeping overnight yet - but I have the Apple wireless keyboard and Mighty Mouse (both BT / Bluetooth). When awaking with keyboard it does not reboot. When waking by Mouse button it does reboot, consistently!

So, I turned off Mighty Mouse and hooked up a Logitech (RF via USB) - and NO reboots.
Now, I haven't been able to test this for long periods of time - and it could still be coincidence; but I slept and woke it 3 times with Mighty mouse; reboot every time.
I then slept and woke with Logitech mouse or keyboard about 15 times - no reboots.....

Let it sleep only 1-2 minutes every time testing (as I had a flight to catch and won't be able to test more till weekend).

Anyone else seeing this pattern at all? I have not yet tried reset the pram/smc either.....

Thx,
Dan

There have been fixes for USB devices and hubs, as well as 'some' better support for 3rd party devices.

... anything to get to the bottom of this would help, even knowing if there are certain models with a specific something chip or logicboard.

FWIW, I have had bluetooth turned off from day one, and had the reboot problem prior to SMC/PRAM reset (see my earlier post).

Pattern? Seems to add to the randomness of it all...

Confirmed: 5.2 didn't resolve the issue for me either. Printing FedEx labels now and will be erasing the hard drive tonight. What a waste. Let's hope the replacement does better...

Darn...
it was worth a try
Yeah, so this seems COMPLETELY random then, and unrelated to ones Hard drives, brand, memory, Graphics Card, periphs from what I can read off all the posts
Also not a matter of 'first batch' (mine just arrive 2 days ago)...

For what it's worth, just woke it up from sleep (still with BT Mighty Mouse not attached) and woke up fine again. So, assuming it does reboot again at SOME point, no pattern at all ... ?!

dan

Add another confused voice to the fray...
I have a 2.8Ghz Octo that I bought about 3 weeks ago. It seemed to wake from sleep just fine until several days ago. Unfortunately I haven't kept a log of system changes like I should... But it may have been around the time of the 10.5.2 update. Yesterday it rebooted from waking and I quickly found this thread. I did two things, as I recall; I turned off Bluetooth, and I reset the SMC and zapped the PRAM several times. Upon waking the machine this morning, all is nominal. My impression is that it was the SMC/PRAM bit that fixed the problem, but reading others' reports here I am not 100% sure. I really hope Apple acknowledges this and issues a fix...

Count me in, having the same problem (rebooting from sleep, freezes while surfing) on my brand new 2.8 octo /w GT6800. Very frustrating, signing the petition. Hoping Apple fixes it... or else returning it.