G5 mysteriously sleeping

Discussion in 'Macintosh Computers' started by zzlaz, Feb 3, 2005.

  1. zzlaz macrumors newbie

    Jan 30, 2005
    I have a brand new G5 that I am using as a server for a small office. I've attached our Epson to that machine locally and we are all printing to it on our LAN.

    I have the preferences set so that the computer should never sleep or go into energy saver mode. However, it seems to be ignoring these settings. Even more strangely, it will stay awake and then promptly fall asleep as soon as someone sends a print job to it.

    I am updating the Firmware right now and then I will reset the PMU. But I am very confused. Any ideas appreciated. TIA.
  2. hotmaj macrumors newbie

    Mar 13, 2004
    thermal runaway

    sounds like a thermal runaway check your system log (apple -about this mac-more info- syslog) for the words thermal runaway if so it probably needs new cpus mine did ( getting it nack tomorrow see if it has fixed the problem)
    same with others there is an internal apple article no 93988 which talks about the thermal runaway problem
  3. Blue Velvet Moderator emeritus

    Jul 4, 2004
    Panther Bug

    This may be relevant or possibly not but best to eliminate this option anyway.

    In the Energy Saver preferences – Sleep and Schedule – reset your settings the way you want them BUT don't click/close the lock...

    For some weird reason, closing the lock seems to force Energy Saver to 'forget' its settings...
  4. zzlaz thread starter macrumors newbie

    Jan 30, 2005
    thermal runaways

    found some thermal runaways in the log. i just got this machine swapped because of a defective drive cable in the previous one. it's all of two days old you really think its the cpus?
  5. hotmaj macrumors newbie

    Mar 13, 2004
    100% its thermal runaway issue

    yes mate if u found them in your log its definitely a cpu module or thermal sensor callibration problem ring apple and let them know that they have sent you another lemon. It really pisses me off that they have still not fixed this problem
  6. Makosuke macrumors 603

    Aug 15, 2001
    The Cool Part of CA, USA
    Unless you have it wedged into some sort of tiny cabinet with absolutely no airflow (you don't, right?), then yep, there's something wrong with the CPUs or their thermal sensor.
  7. zzlaz thread starter macrumors newbie

    Jan 30, 2005
    is it worth running memtest or something similar before calling?
  8. c0052350 macrumors member

    Oct 10, 2003
    get them or it replaced

    just got mine back today they replaced a cpu not both tight sh*ts but the difference is amazing so far ( tough wood) it seems like a totally different beast no thermal runaways rendering 1080i hd footage - mpeg 2 in fcp hd with both cpus at full usage its very very quite actually the fans rev for a few seconds and then back to what they are like when cpu load is idle. the rendering took 40 odd minutes and the beast was very silent.
    So for i can't replicate the thermal runaway problem.
    my only concern is that one cpu temp is higher than the other (could still have a crappy cpu left) the temp difference varies 10-14 C between the two. My cpu 1 under full load never goes over 82c and cpu 2 never goes over 72c amazingly after the initial fan revs the system is quite as when its idiling with the hdd fan kicking in for about 4 secs now and again.
    Now if i could get the other cpu changed it would somewhat put my mind at rest regarding the large temp difference by the way the idilng temps now are:
    cpu 1 63c/145f
    cpu 2 57c/134f

    processor setting is highest
  9. zzlaz thread starter macrumors newbie

    Jan 30, 2005
    applecare told me to do the same, but on a whim i figured i'd give it 24 hours with the processor setting switched down to automatic. worked perfectly - the log had been showing a thermal runaway just about every hour. now i haven't had one in 24 hrs. at least it buys me some time to decide what to do. thanks all who responded.....
  10. hotmaj macrumors newbie

    Mar 13, 2004
    just bides you time

    i too found that running it in automatic helped but the problem was still there and sure enough running dvd studio pro brought it back so the best thing is to definitely get them replaced

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