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MacPro suddenly losing power - what log file(s) can I check?

1512 Views 7 Replies Latest reply: Sep 9, 2008 1:04 AM by George Coghill RSS
Joe Wegrzynowski Calculating status...
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Aug 27, 2008 8:16 AM
I've been having a strange problem over the last several months where my MacPro will suddenly turn itself off. It's exactly like a power failure, but only the computer is affected (monitor, other devices all fine).

I bought a UPS thinking that it was a line problem, but the machine still turns itself off once in a while, anywhere from once or twice a month to three times a week.

I suspect it's being caused by something connected to the computer, but there's not too much there - a USB hub, printer, iPhone, a couple of iPods, and a gaming headset.

What log files on the Mac can I check for possible causes to this problem? I tried looking through the Console Messages app for log errors, but there's so much there I was overwhelmed by data.

Can anyone suggest a specific log or two to inspect, or any troubleshooting techniques that may identify the problem? Anyone ever have a similar problem?

PowerMac, Mac OS X (10.5.4)
  • The hatter Level 9 Level 9 (58,535 points)
    All it takes is one bad USB cable sometimes to cause a panic.

    Also, what other equipment is on the same circuit breaker.

    Is your UPS 1200VA or above?

    Same tips that work for kernel panics probably.
    Mac Pro WD Caviar 640s 7300GT Sonnet Tempo E4P, Mac OS X (10.5.4), G4-MDD 10.4.11 ACD 23" APC RS1500 Vista x64
  • Lofty Becker Calculating status...
    This isn’t too helpful, but I’ve been having exactly the same problem over the last couple of weeks. It doesn’t seem to be power line (printer and other stuff on the same line don’t go down). Oddly, it turns itself off and then reboots (though I do NOT have reboot after power failure checked).

    Two things I’m presently focusing on are (a) the fact that, at least the last few days when I’ve been logging the problem, it ALWAYS does this about 8:15 a.m. Doesn’t matter whether I’m at the computer using it or not. (b) Always, always, always when it’s happened I’ve had Microsoft Word open. But I almost always have Word open, though I’m going to make sure that I don’t have it open at 8:15 tomorrow morning.

    Reset PRAM, checked the disk with AlSoft’s Disk Warrior, and downloaded and am currenty running Symantec’s AntiVirus. Can’t think of any likely viruses that would do this, but it seems worthwhile to me to check. I’m going to check fonts for badness of some one or more, and I’m this moment downloading an update to Microsoft Office that is supposed to make it more stable. But an application shouldn’t be able to force a power-down and reboot.

    I’m going to the Apple store tomorrow to ask for advice there. My one post here hasn’t gotten any suggestions.

    It’s not an obvious kernel panic (i.e., not the usual kernel panic message). Just a little power click, black screen, and a few seconds later a reboot.

    Powerbook G4, Mac OS X (10.4)
  • retired upgrader Calculating status...
    I have same problem. After first few weeks with no problems, my new MacPro has twice quit and promptly rebooted. No Microsoft software in use, or even on the computer. Happened at different times of day, and doing different things.

    It is on UPS of sufficient capacity (1500VA), which, incidentally did not blip, so it was not a power blip. And the crash does not occur during a power blip -- system stays on just fine.

    Any Apple reports about this? Is it a known defect in the 8-core MacPro?
    MacPro dual quad 2.8GHz, Mac OS X (10.5.4), Two months old
  • The hatter Level 9 Level 9 (58,535 points)
    I would not ever install Norton AV, even if it is suppose to be compatible with 10.5.4. There is a new version of ClamXav today, or there is demo of Intego AV if you do exchange Word/Office files and think you have, it would be dormant almost certainly and not cause anything.

    Leopard Cache Cleaner also includes ClamXav engine.

    I use to see multiple ssh and other attempts on my router, still do but just hardened it more, to try to login or perform remote desktop logins. Even my ISP 'knocks on the door' and my internet connection was dying every day at exactly 3PM.

    Is there an auto-startup time set? Reset SMC or delete or something?

    The most important thing is insuring these restarts aren't corrupting the directory or journal or files.
    Mac Pro WD Caviar 640s 7300GT Sonnet Tempo E4P, Mac OS X (10.5.4), G4-MDD 10.4.11 ACD 23" APC RS1500 Vista x64
  • George Coghill Level 2 Level 2 (475 points)
    I've just recently started seeing this problem as well - the MacPro will just turn off as if the power went out, although I have a UPS backup so it's beyond the power supply (at least from the wall).

    Monitors and peripherals all retain power when this happens. Nothing new has been added since I bought it a few months back - RAM, external hard drives, etc. have all been running the same since I purchased it. No new software has been installed recently, but I suppose a software update could be a culprit. Just seems more like a hardware issue to me.

    I really hope it's software though, prefer not to be without my work Mac if it needs to be sent in for repairs.
    MacPro Dual-Quad 2.8, MacBook 2.1, Mac OS X (10.5.3), Dual Monitors : Wacom Intuos3 Tablet
  • George Coghill Level 2 Level 2 (475 points)
    MacPro Dual-Quad 2.8, MacBook 2.1, Mac OS X (10.5.4), Dual Monitors : Wacom Intuos3 Tablet


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