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A way to stop the Freezes in some PowerBooks.

25714 Views 320 Replies Latest reply: Jan 8, 2008 2:44 AM by TeacherGroupie RSS
  • kornfobic Calculating status...
    Currently Being Moderated
    May 18, 2006 11:35 PM (in response to Derivatize)
    I have read about this problem since a couple of months ago and I didn't have any problems whit mine UNTIL I updated my PB to the OX 10.4.6<--- 6, thats when it all begin, since, i have the same issue and it keeps coming and cuming, but when i use the installation disk and run the "Disk repair" at "Disk utility" and it some times stops (for some time at least), so Im 110% sure it has something to do whit SOFTware, and more specific whit the 10.4.666 update.
    PowerBook, Mac OS X (10.4.6)
  • AndersB Calculating status...

    Just to add myself to the list.
    Turning off NAP solved all my problems

    I had been having random kernel crashes and system freezes for two+ months. I had sent my pbook in for repair twice (to two separate Apple authorized repair shops), both times the shops sent the computer back as having no fault.

    I suspected everything from a dodgy power unit (which I replaced) to bad RAM. Some people said I should replace the Logic board (out of the question as the computer is well past its warranty) or give up and sell the thing on eBay.

    All in all this cost me over a hundred pounds in repair fees, shipping and parts, not to mention the amount of time I have spent over the last 2 months looking through forum posts trying to find the answer to the problem and the stress of owning a sick computer.

    I should be angry at Apple for whatever it is that made this occur, but I am just happy that someone figured out that turning this NAP thing off was the answer.

    Thank you so much!

    Powerbook 1.25 GHz G4 15"   Mac OS X (10.4.6)   1.5 Gb DDR SDRAM
  • AndersB Level 1 Level 1 (0 points)
    Thank you Belarmino,

    I am just glad it worked...
    and yes, Cambridge is a nice place to live (and work). The food and the coffee aren't so great, but you get used to it...

    Powerbook 1.25 GHz G4 15"   Mac OS X (10.4.6)   1.5 Gb RAM
  • pacoclandestino1 Calculating status...
    Hi guys, hola Belarmino
    One quick question, i went trough the console see if i could find a log to confirm the kernell panics?could someone point out what log or logs i should keep an eye on,just to confirm the amount of them if frequent or not etc etc...yesterday i was using Adium chatting to a friend in germany, also listening to music in itunes surfing the net, nothing to demanding, and in the space of two hours i had one Kernell Panic(black and grey screen that says you have to hols start button for a few seconds and lalala lalala) I ended up starting computer from Instalation DVD as a friend recomended and did a verufucation of erros on start disk, and i did have probs but disk utility fix it.
    Another thing i like to ask anybody ,is that as it is i have the setting for Battery and scren savers and so on, at never, so they never go to sleep( it would caus eproblems with my sound editors), so in a certain way dont i have nap turned Off???would turning ity off would help?
    In any way what i first need is to see what one is the crash log, to confirm the crashes, second will do the nap trick, and tghen i wait and see if it is helping or n ot, but it is very disapoiting having to fiddle with your PB to get the performance the box says you will get without it.............
    All the best
    PB G4 15" 1,67, Mac OS X (10.4.2)
  • sorpat Calculating status...
    Currently Being Moderated
    May 23, 2006 1:03 AM (in response to kornfobic)
    My PowerBook got a serious problem after updated to 10.4.6 too! It runs very very slow after that even though I format my computer right now, it still very slow!
    PowerBook G4 1.67GHz, Mac OS X (10.4)
  • pacoclandestino1 Level 1 Level 1 (5 points)
    Hi Belarmino

    Yes i always take the Battery off and work pluged in while at home(told by an Apple Tech here in Barcelona, the thing is that ,as it is, and because of recomendations from the makers of my sound card and sound aplication (Protools), i almost have a sort of NAP thing as i have configurated the screens, hard disk not to ever go on sleep mode......serliously i dont remember since when the kernell panics started, mainly because i had no idea that was one(the famous black and grey screen), the thing is that going through the logs i have seing the kernell panic words a few times,problem is dont know what one, and i have loads of logs,i mean loads.....a friend recomended that i tried to check and if necesary repair my starting disk, i did, and bingo there was some problem and fix it...since then its four days ,no one panic yet..... i am going to hold a bit see if it stays there i still love to find out that log and try to get someone to have a look at it.....
    am begining to realise how little i know about apple, and how complex machines they are,in a good sense i mean

    thanks again ,will keep you posted but really hope this could solve itself off, dont like those panics told they are really not good for your system.
    Another thing i have seing that everyone ,but me ,that have the KernellP problems have the 10.4.6 version of OSX, could that have something to do with it?????, or you were also getting it before the upgrade?????(am staying well away from that one, everyone is freaking out with it!
    PB G4 15" 1,67, Mac OS X (10.4.2)
  • thk123 Calculating status...

    First, thank you for this "nap off" workaround, and for this discussion more generally.

    I have a Powerbook G4 15" HR (Model 5,8) with 1.5 GB RAM. I have experienced intermittent system freezes, two or three times a week, since purchasing the Powerbook in November 2005. Despite various efforts, including reinstalling system software, the freezes have continued.

    I have now turned off the processor nap function and have been without any freezes for one full week. This workaround appears to work in my case.

    It would be nice to get some official feedback, as noted by Belarmino Rimada in the initial post, on whether turning off the nap function has any long-term negative effects on the Powerbook. The increased battery drain, for example, seems to suggest that the battery, at least, will wear out more quickly with the nap function off.

    Thank you, again, for this "solution."

    G4 Powerbook 1.67   Mac OS X (10.4.6)  
  • adam_apple Calculating status...
    Hi, just wanted to put my hat in the ring on this.

    Firstly my 15'' powerbook with 1.5 gb ram (1gb re-seller added), bought in Jan this year has been displaying all these symptoms.
    It won't wake from sleep, has full machine freezes that need forced restarts & the odd kernal panic (1 a week).

    The chud tools cpu nap hack above has resolved all these issues!

    Many thanks to the poster of this fix, i'm at 14 days uptime as i write this, the longest before that would have been 3 days.

    While my machine is now running as it should, i can't help but think that this is a hack. What happens when the time comes to resell? Tell the buyer to download the chud tools and write an login script to turn cpunap off? I wouldn't be happy with this buying a second hand machine let alone a brand new one!

    So, if any one from Apple does read these forums can you please advise us on a next step of action for this issue?


    PowerBook 15'' (last of the G4's), 1.5 GB Ram   Mac OS X (10.4.6)  
  • Andy_B Calculating status...
    Currently Being Moderated
    May 30, 2006 2:40 AM (in response to adam_apple)
    Indeed, it is becoming very clear that there is something faulty with the hardware when we cannot upgrade past 1 Gb of Ram without having these sporadic kernal panics.

    I for one think that we should have several options:
    1) Have it the problem resolved by Apple (preferred option).
    2) The opportunity to return the computer for a full refund.
    3) Exchange with a MacBook Pro or a fully decked out MacBook.

    This I believe would help address the problems and hardships we haved had to put up with regarding this PowerBook anomaly.
    last rev. TiBook G4 1Ghz/2x Region Free SD & last rev. AL Book Hi-Res/DL, Mac OS X (10.4.6)
  • ToddDunagan Calculating status...
    Currently Being Moderated
    May 30, 2006 11:17 AM (in response to Andy_B)
    so the question - how do we get apple to move on this? it sounds as if all calls to apple haven't moved the situation forward, as of yet. but i'd say that was before we had a substantial user base to attest to these very specific issues. anyone have thoughts as to how to move forward?
    Powerbook G4 15'' 1.67, Mac OS X (10.4.6), 1GB Ram
  • DSL_Steve Level 1 Level 1 (45 points)
    Currently Being Moderated
    May 30, 2006 11:29 AM (in response to ToddDunagan)
    November 2005 Hi-Res 15" PowerBook G4 1.67MHz with 1GB RAM (two Apple installed 512K modules) and no freezes here.
    15" PowerBook G4 1.67MHz, High Res, X2 DVD, 7200 RPM Hitachi HD, 1GB RAM, Mac OS X (10.4.6)
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