6 Replies Latest reply: Jun 28, 2006 8:44 AM by RJ777
jim nollman Level 2 Level 2
I've had my dual G5 1.8 for about 18 months. Today something happened that has me concerned.

I left the computer for ten minutes. When I returned, the fan was blasting, so loud i could hear from two rooms away. The screen displayed a message in several languages telling me to reboot. so I shut it down. i turned it back on about 3 hours later. so far everything seems OK. i don't have any programs running in the background. At least none that i know of.
Can someone explain what happened. More important, do I need to do anything to fix it?

Dual 1.8 G5 and G4 powerbook, Mac OS X (10.4.6), Protools Digi002 system. Wacom tablet.
  • Mike Sombrio Level 6 Level 6
    That's kernel panic Jim. Look here:
    Run disk utility from your install disc and repair the disk and then repair permissions to start.
  • maclover Level 4 Level 4
    Some explanation and help in this brief overview from Dr. Smoke

  • jim nollman Level 2 Level 2
    I found the panic.log. What I am copying, below, appears to document the pertinent kernal panic. If anyone can offer a translation into English, it is appreciated, so i can remedy the problem:

    Thu May 4 14:04:44 2006

    Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x000000001A77BC18 PC=0x0000000000A22E48
    Latest crash info for cpu 0:
    Exception state (sv=0x3A13CC80)
    PC=0x00A22E48; MSR=0x00009030; DAR=0x1A77BC18; DSISR=0x40000000; LR=0x00A9CF04; R1=0x220FBD00; XCP=0x0000000C (0x300 - Data access)
    0x00033820 0x00A9CF04 0x00A972E4 0x00AA2108 0x002CF808 0x000A9894
    Kernel loadable modules in backtrace (with dependencies):
    dependency: com.apple.iokit.IOPCIFamily(1.7)@0x459000
    dependency: com.apple.iokit.IOFireWireFamily(2.0.9)@0x9ff000
    Proceeding back via exception chain:
    Exception state (sv=0x3A13CC80)
    previously dumped as "Latest" state. skipping...
    Exception state (sv=0x3A13C000)
    PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
  • Steve Boultbee Level 5 Level 5
    Do you have a FireWire device connected to your computer? IT appears the kernel panic was caused by something on the FireWire bus.
  • jim nollman Level 2 Level 2
    Yes I have a Digi 002 rack music system. It wa son at the time. i also have a printer and an external hard drive but both were off when the kernel panic occured.I have written to digidesign to see if this has occurred with anyone else.

    any other ideas?
  • RJ777 Level 1 Level 1
    I have had the Dual G5 1.8 for about 15 months. It has been a great 15 months. Then I had a similar problem: I was not doing much at all, just checking email and my fan just went crazy. Loud, racing, definately like something was not right. I did not see the messages you saw maybe because I was there when it started and immediately rebooted. The scary thing for me though was when that restart occurred the system went down and then came up with a BLANK SCREEN!! and the fan slowly revved back up again.

    I called support which led me to an article on resetting the PMU which was very easy. It did the trick. Not sure if the kernel panic is related but it is another idea related to this fan problem.

    Here is the Resetting PMU link on how to and then of course there are other discussions related to it.



    PowerMAC G5 Dual   Mac OS X (10.4.6)