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Thread: Does my G5 need some Therapy?

  1. #1

    Does my G5 need some Therapy?

    Please help me as I have lost all confidence in LW and my Mac G5 2.5 dual, Ati 9800XT, 6gb ram.

    I have been doing some intensive rendering of an animated walk through of a Fruit Machine Arcade, about 1250 frames. The G5 was rendering over a few nights and it has crashed several times early in the morning totally locking up and fans on full blast sounding like a jet taking off.
    Has anybody had similar problems? If so what could be causing it?

    I have a six year old G4 and that has been as stable as a rock....G3 before that, but not the G5, it does a better job of heating the room!

    Lightwave 8.5 has not been that stable either?

  2. #2
    Quote Originally Posted by csgoss
    Please help me as I have lost all confidence in LW and my Mac G5 2.5 dual, Ati 9800XT, 6gb ram.

    I have been doing some intensive rendering of an animated walk through of a Fruit Machine Arcade, about 1250 frames. The G5 was rendering over a few nights and it has crashed several times early in the morning totally locking up and fans on full blast sounding like a jet taking off.
    Has anybody had similar problems? If so what could be causing it?

    I have a six year old G4 and that has been as stable as a rock....G3 before that, but not the G5, it does a better job of heating the room!

    Lightwave 8.5 has not been that stable either?
    one good thing after a 'hard' crash is always to start in single user mode and to do a complete fsck. probably your disk got corrupted after so many crashes. if fsck doesn't repair it, you may need a toll like diskwarrior or in the worst case, clean and reinstall the complete system. good luck!

    markus
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  3. #3
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    csgoss

    I had what sounds like the same problem with my Quad G5 just two weeks ago. Turned out it was a SIMM Chip (RAM) that had gone bad. I removed all but two pair of the RAM and rebooted. I kept adding the additional RAM (in pairs) until the system crashed again. I removed those chips and the system has been running fine since. I'm still awaiting the replacement chips, but atleast I'm running again.

    You might try that first before doing anything with you HD.

    Good Luck!
    Jeff

  4. #4
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    Lightwave 8.5 on my employer's G5 Quad (4 gig RAM, Quadro fx 512 mb graphics) tends to crash sometimes when I hit Render. It did this from day one, with a brand new computer. (The computer keeps going, it's only LW that "closes unexpectedly".) It can be from hitting F9 for a test render, or clicking on Render Frame or Render Scene. Usually after a couple of crashes it will start up again and work. LW 8.3 on my PC is less stable than 5.6, but on the G5 this is much more frequent.

    So far, once a scene has started rendering and saving frames, it's kept going until it was finished.

    But right now, I've crashed LW 14 times in a row. Mostly I'm not even getting the "LW closed unexpectedly" message, it just goes. It crashes with the same scene that rendered ok yesterday, it crashes with other scenes that worked before, it even crashes with a new scene with only one simple 1 poly rectangle in it. Everything is normal, until I try to render.

    At the moment I may need to drive home, get my PC, and try to transfer the object and scene files across, because LW on the G5 is totally useless and I'm running out of time.

    I'm not sure I understand what to do with the HD, maybe I'll test the RAM first.

  5. #5

    Tested the G5 with Techtool 4

    I have tried testing the OS with Techtool 4 and Ram and Drive appears to be Ok? But I have installed 4Gb Kingston Ram recently.... I do run quite a few applications on the same drive such as Final Cut Studio and Adobe Creative suite, so there could be a conflict there, although I thought those days were gone with OS9?

    I am also hoping that Lightwave 9 will be more stable, especially when you are up against tight dealines and your Mac starts giving up on you.
    Your confidence crashes along with it and you start having thoughts about getting a PC.

    I think I will take it to a Mac expert and reluctantly get it checked out, especially for piece of mind etc.

  6. #6
    Registered User Johnsongraphix's Avatar
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    Three out of three

    I'm not sure if I have your solution but I have had problems with one of my G5's before and it would crash late at night unexpectedly and when I woke up in the morning I would have to restart it. That was the only time I have had that problem and turned out to be a power supply issue. I use UPS systems for the purpose of keeping the machines moving even when the electricity went out. However, the UPS was what was causing the problem. Apparently the newer G5's require more volts or something (I'm no expert). but as soon as I switched UPS's with machines I had no more issues. My mac's run 24/7 and I've been rendering on three of them for a two weeks straight. In fact they're still rendering now as I surf the web and listen to itunes.

    My experience has always been PC's crashing constantly or acting up even when I'm not doing much with them. Then I spend a weekend troubleshooting the problem, which usually involves reinstalling the OS. They give me the biggest headaches, but it's all a matter of what you know i guess.

    Ooh. Check with your screen saver or energy saver too. If the system tries to sleep sometimes it can cause problems. That's all... good luck!
    .drawrof thgiarts gnieb sa flesym fo thguoht syawla I

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  7. #7
    Super Member Captain Obvious's Avatar
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    Put the system DVD in the tray, and boot the computer holding the alt key. Choose the hardware tests, and run the complete test. Faulty RAM might be the problem.
    Are my spline guides showing?

  8. #8
    Thanks for the info, I will check the power supply issue and try the Mac hardware tests.

  9. #9
    I did an Apple hardware test everything passed.

    To test the machine again I rendered an architectural scene using FPrime set to radiosity, everything was going fine until just over 18 hours, then whammo!
    Crash ... fans going full blast again.... it will be going to an Apple expert next week.... before I end up going back to the good ol' days of illustrating by hand.

  10. #10
    Art Monkey gatz's Avatar
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    Did you let the hardware test loop? Hold down Control - L, run it overnight. It definately sounds like RAM issues. Did you add third party RAM? The Apple expert will probably remove this and tell you the machine is fine

    rg


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  11. #11
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    I had the same problems with my G5 consistently when I purchased in June 2004 right out of the box, running just for a few days I noticed the fan sounded like a blow dryer, but nothing related to LW. It took three trips to Comp USA's authorized Apple service last year to finally fix it from crashing and the fan going crazy. I think the last thing replaced was the logic board. It's running fine now and no trips this year to CompUSA. Good thing I purchased the AppleCare...it's good until 2007.

  12. #12
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    Captain Obvious -
    There are 2 installation DVDs, is it on disk 1 or 2?
    And how do you put a disc into the drive, without turning the Mac on and it already booting up? (I just KNOW these are stupid questions, but I'm deperate, I've got no pride left!)
    Hang on...
    Another 7 crashes, but I may have found something that helps. LW multithreading was set to 8 threads, I re-set it to 4 threads, and now it only crashes on render SOME of the time. I remember on my dual processor PCs it was common to set the multithreading to double the actual number of processors, so getting the Mac Quad with it set to 8 seemed normal. But reset to 4 threads, it's back to being unreliable instead of totally useless. I don't know if this would apply to other crash problems.

  13. #13
    Super Member Captain Obvious's Avatar
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    The hardware tests are on disk 1, I think.

    Boot the computer holding alt-cmd-o-f, so you'll boot into Open Firmware mode. Now, type in "eject cd" (in lowercase, without the quotation marks), and the tray should pop out. Put the DVD in, and type "reboot" and it should reboot. Now hold the alt key until you can choose the hardware test.
    Are my spline guides showing?

  14. #14
    Super Member mike_stening's Avatar
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    one little work around that works with the rendering crash when hitting F9 is to click on the redner frame button in the render drop down, doesn't always work but does seem to crash less and can help if F9 is acting like self destruct button. same if F10 does the same thing.
    Core2 duo 3.6 4gb ram GTX550 Ti
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  15. #15
    Registered User newtekker04's Avatar
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    I don't have a mac, but like BrainWave3D mentioned, it could be a logic board issue. My brother had the same problem with his brand new mac last december. He put it on standby, tried to awake it, and the fans went on overdrive, even though the machine wasn't even warm. He tried restaring it a number of times with no luck; the computer was inoperable. He even was walked through booting to the bios by a apple technician, and even that didn't work. He took it back to the dealer and they found that the problem was the logic board. Good thing the machine was still covered - the replacement board costed $600+!

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