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MacBook · Sep 14, 2006, 06:51 AM

The fan on my PB 12" 1.5GHz runs continuously, faster when the AC adapter is plugged in, but it runs continuously when on battery power, too. There is a fix to this (to raise the temperature when the fan kicks in) to replace a Tiger file with AppleADM103x.kext but I cannot locate the file. I have read that the AppleADM103x.kext file must be extracted from an earlier update, supposedly 10.2.8, but that download does not include the file. Can anyone help with this issue?

imitchellg5 · Sep 14, 2006, 02:52 PM

Is your case bent? Mine is bent so that the airways are blocked. The fan almost constantly runs.

MacBook · Sep 14, 2006, 05:55 PM

Originally Posted by imitchellg5

Is your case bent? Mine is bent so that the airways are blocked. The fan almost constantly runs.

No, it is not bent. It does have one of the recalled batteries, but does not run particularly hot.

amazing · Sep 15, 2006, 12:25 PM

Download Temperox, which will give you the fan speeds. Report back about which fan and what speed.

Keep Activity Monitor (in Utilities Folder) open in corner of screen, set to All Processes, set to All Processes at the top, and set to CPU at the bottom. Is the CPU always pegged to 100 % usage? What's causing that?

Are you using any software that's running in Classic?

MacBook · Sep 17, 2006, 06:19 AM

Originally Posted by amazing

Download Temperox, which will give you the fan speeds. Report back about which fan and what speed.

Keep Activity Monitor (in Utilities Folder) open in corner of screen, set to All Processes, set to All Processes at the top, and set to CPU at the bottom. Is the CPU always pegged to 100 % usage? What's causing that?

Are you using any software that's running in Classic?

CPU is usually not at all near 100%. The fans stay on even when the notebook is idling (that is, I am not doing anything) and CPU use is at 10-20%.

No, I am not using any software that is running in Classic.

I downloaded Temperox but there was nothing in the folder when I went to install it. I might try it again next week.

tie · Sep 17, 2006, 09:08 PM

Are you in an air-conditioned building? Ambient temperature is very important. I can't run my 12" PB on hot days in uncooled rooms, because I find the constant fan noise too distracting. (Even idling is enough to start the fan going after a few minutes, and I can't get the fan off without putting the computer asleep for 10-20 minutes.) But a cooler location, and all is again quiet.

Simon · Sep 18, 2006, 01:59 AM

Are you using an external display? When I hook up my 12" PB to my ACD, the fan will run no matter what I do. If I let it idle for hours, the fan will be on constantly. If I just use the internal screen alone, the fans will shut off when it's idle.

MacBook · Sep 18, 2006, 06:32 AM

tie: It's always in an air conditioned room, both at work and home. I cannot recall even one time when the ambient temperature was not adequately cool.

Simon: The fan runs all the time with no external display and no external anything. It just sits there and runs unless it is put into sleep. The fan seems to run faster when connected to the AC adapter, but it runs when on battery power as well.

Simon · Sep 18, 2006, 06:45 AM

Hmm, if you have AC and your firmware is up to date there is probably not much else you can do. Have you tried an iCurve? You could of course also just sell it off and get what your name indicates...

papworth · Sep 18, 2006, 07:09 AM

I have this same feature in my 12" revA pb.
I've come to the conclusion that the GPU has more demands made of it in Tiger than in the earlier systems, and this is what the fans are trying to cool, so I'm not sure what could safely be done about it.

MacBook · Sep 19, 2006, 01:05 PM

It does seem as though it may be endemic to the processor limitations running Tiger. I have tried everything else possible. Oh, well.

I actually can use either the PB 12" or the MacBook, but prefer the PB because of the weight (almost 10 ounces lighter), size, keyboard, and general construction. It is true that the MacBook's screen is nicer, its more powerful, and quieter. But it also runs much hotter, and I have had some trouble with a few applications that rely on Rosetta (including Filemaker, Word, and a couple of others) in that I sometimes have to reboot the system in order to start up these programs.