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Q: Dual Quad-core Mac Pro reboots from sleep

My brand-new Mac Pro nearly always restarts rather than waking up from sleep. Just now I left it to go to sleep by itself and came back two or three hours later. When I touched the space bar, it restarted.

I have an IOGear firewire hub plugged in with nothing attached to it and lots of USB devices plugged in.

Dual 2.8 GHz Quad-core, Mac OS X (10.5.1)

Posted on Jan 20, 2008 7:09 PM

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Q: Dual Quad-core Mac Pro reboots from sleep

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  • by BlueHorseshoe2,

    BlueHorseshoe2 BlueHorseshoe2 Jan 28, 2008 7:06 AM in response to transplant6
    Level 1 (0 points)
    Jan 28, 2008 7:06 AM in response to transplant6
    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.
  • by JimRobertson,

    JimRobertson JimRobertson Jan 28, 2008 7:21 AM in response to transplant6
    Level 1 (1 points)
    Jan 28, 2008 7:21 AM in response to transplant6
    I have an idea. Since the entrée into this thread probably is having experienced this issue, let's query people we know who've purchased the new Mac Pro and see if we can find people who have not experienced this problem under the right circumstances (an overnight sleep).

    The power manager reset "fix" didn't work for me, as I reported previously (nor has it for several others).

    I'm not sharing folders via samba. I've not yet had graphics card freezes. I've not had a system freeze during intentional reboot.
  • by barshnik,

    barshnik barshnik Jan 28, 2008 8:41 AM in response to The hatter
    Level 1 (85 points)
    Jan 28, 2008 8:41 AM in response to The hatter
    <<And not from the terminal, but from single user mode command line.>>

    Could you explain how to do this for someone new to OS X? Thanks.

    John F
  • by The hatter,

    The hatter The hatter Jan 28, 2008 8:58 AM in response to barshnik
    Level 9 (60,935 points)
    Jan 28, 2008 8:58 AM in response to barshnik
  • by barshnik,

    barshnik barshnik Jan 28, 2008 5:51 PM in response to The hatter
    Level 1 (85 points)
    Jan 28, 2008 5:51 PM in response to The hatter
    Hatter, thanks. I now feel suitably stupid for not searching. My bad...

    John F
  • by cyclelogicpress.com,

    cyclelogicpress.com cyclelogicpress.com Jan 31, 2008 9:51 PM in response to transplant6
    Level 1 (0 points)
    Jan 31, 2008 9:51 PM in response to transplant6
    Same spontaneous restart issue with 24-inch iMac.
  • by Trinity,

    Trinity Trinity Feb 1, 2008 12:53 AM in response to JimRobertson
    Level 4 (2,857 points)
    Feb 1, 2008 12:53 AM in response to JimRobertson
    New Mac Pro with stock configuration sleeping and waking fine during the first 3 days of life.
  • by Merged Content 1,

    Merged Content 1 Feb 1, 2008 5:50 AM in response to transplant6
    Level 6 (11,040 points)
    Feb 1, 2008 5:50 AM in response to transplant6
    Ditto. I've had my Mac PRo 2.8 quad for a few days with no problem. Yesterday i installed 6GB RAM from OWC to make a total of 8GB. When I hit the mouse this morning after overnight sleep, computer restarted rather than awakened. I've slept for a few seconds and woken up with no problem. I'll try some of the fixes here.
  • by The hatter,

    The hatter The hatter Feb 1, 2008 6:14 AM in response to Merged Content 1
    Level 9 (60,935 points)
    Feb 1, 2008 6:14 AM in response to Merged Content 1
    You might want to check out the "Mac Pro 2008 Reader Report":
    http://www.xlr8yourmac.com

    Adding memory on G5s often required one to reset pram/nvram for it to show up properly.
  • by danyul,

    danyul danyul Feb 1, 2008 6:26 AM in response to transplant6
    Level 1 (15 points)
    Feb 1, 2008 6:26 AM in response to transplant6
    Add another to the list.
    2.8 with stock ram
  • by JeffRutan,

    JeffRutan JeffRutan Feb 1, 2008 7:30 AM in response to danyul
    Level 1 (0 points)
    Feb 1, 2008 7:30 AM in response to danyul
    I am having the sleep - wake - reboot problem with my new 3.2GHz Mac Pro too.
    Nearly every time it wakes from sleep - fans up high - no display output - reboot.
    No other symptoms apparent so far. I am very pleased with the performance while it is running...

    Yesterday morning I ran hardware test off the install DVD and it appeared to lock up during memory test (no response to clicking the Stop Test button). I tried this a couple of times in normal and extended test modes with the same apparent lockup.

    I was suspecting the 16GB of memory (8 x 2GB) that I put in, but puzzled why it provides flawless performance under heavy memory and CPU load during normal operation (including heavy Photoshop and modo 3D content creation and rendering) if the memory is bad enough to lock up the hardware test? No indication of anything wrong at all - just amazing performance - while it is running. Even during extensive successful installs of Boot Camp, Windows XP, Final Cut Pro, Adobe CS3, MS Office, iWork and several other pro software titles. Only crashes (nearly every time) when it tries to wake from sleep.

    Last night I tested with my original factory memory (2 - 1GB) and it passed the basic hardware test - but appeared to be locked up during the test and required over 30 minutes to complete for the basic test that declares an estimated 3-5 minutes. When I tried the extended test it locked up so bad after an hour that the mouse would not respond. Maybe I should have waited longer, but that seemed excessive so I aborted that test by rebooting.

    Then I booted the system from the hard disk with the factory memory and the first time I tried sleeping it it rebooted on wake just like with my 16GB configuration. However, repeated sleeps after that (always with a few apps running and waiting a couple of minutes before attempting wake) it did not reboot but successfully woke up and performed fine. So I left it in sleep all night and woke it up this morning just fine. I then checked my email and a couple of web forums and tried to sleep it again. I waited a couple of minutes and on wake it rebooted. So the reboot on wake phenomenon appears to be much less repeatable with less memory (or the factory memory), but still is a problem.

    Next I will try my 16GB memory in basic hardware test, but let it run all day while I am at work.

    -Jeff
  • by The hatter,

    The hatter The hatter Feb 1, 2008 7:45 AM in response to JeffRutan
    Level 9 (60,935 points)
    Feb 1, 2008 7:45 AM in response to JeffRutan
    The only thing I saw about AHT was reporting VRAM and number of processors.

    What brand/make of memory is this? possible there is something happening there.
    Might want to try a Safe Boot to limit what gets loaded, and run two dozen instances of Memtest in Terminal (faster and can run more loops, smaller chunks, all concurrently).

    http://docs.info.apple.com/article.html?artnum=307237
  • by Tim3308,

    Tim3308 Tim3308 Feb 1, 2008 8:51 AM in response to Tim3308
    Level 3 (554 points)
    Mac OS X
    Feb 1, 2008 8:51 AM in response to Tim3308
    So far the SMC and PRAM treatment have seemed to work. Wakes from sleep very nicely. Man this machine is sooo quiet and puts out less heat than my liquid cooled G5 2.5 gHz.

    I should add that I'm on 2 UPS probably too small for the job, but they are working.

    Message was edited by: Tim3308
  • by The hatter,

    The hatter The hatter Feb 1, 2008 8:55 AM in response to Tim3308
    Level 9 (60,935 points)
    Feb 1, 2008 8:55 AM in response to Tim3308
    I would be concerned about anything under 1200VA on wake from sleep or real power outage. If they are APC and you have Windows (native) running, PowerChute is very informative. Lots of settings and readings.
  • by Merged Content 1,

    Merged Content 1 Feb 2, 2008 7:51 AM in response to Merged Content 1
    Level 6 (11,040 points)
    Feb 2, 2008 7:51 AM in response to Merged Content 1
    As a follow-up. I reset the PRAM and then let the computer go to sleep overnight. When I came back the next morning it was definitely asleep. I then clicked the mouse, and it woke up WITHOUT restart. So, not a particularly scientific study since it seems that this problem may be intermittent anyway, but I felt it was worth reporting my observations. It's at least possible that resetting the PRAM has an impact on this problem.
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