12" Powerbook fan always on


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12" Powerbook fan always on

Postby Justin McKillican » Thu, 24 Feb 2005 18:28:13 GMT

I have a first generation 12" powerbook g4 and i'm getting the urge to 
smash it with a bat.   Back when 10.3.4 was released, Apple updated the 
kernel extention that controlled the fan and caused it to start at a 
lower temperature.  I was annoyed that the fan was always on so i used 
the kext from the 10.3 CD and replaced it.

All was good until 10.3.8 was released and Apple updated the kext again 
and now the fan is always on.  Going back to the old kext really isn't 
the solution because the same thing will happen in 10.4 and the old 
kext wont even be compatible with the new kernel.

The most annoying part is that this powerbook doesn't even feel any 
cooler, it almost feels warmer.  I'm wondering if this is a common 
problem for first gen 12" powerbook g4s or if there is a convenient fix 
(not for just the fan, but the heat issue).

This thing gets so hot, that simply typing this message caused my palms 
to get all sweaty from resting on the cover.


Re: 12" Powerbook fan always on

Postby Florian Zschocke » Fri, 25 Feb 2005 06:59:06 GMT

If it gets so hot, how high is the CPU-usage ?
If there is a high CPU-usage which process consumes it ?


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Re: 12" Powerbook fan always on

Postby Justin McKillican » Fri, 25 Feb 2005 16:00:32 GMT

On 2005-02-23 16:59:06 -0500, Florian Zschocke < XXXX@XXXXX.COM > said:

barely any cpu usage.  it seems to simply not be able to cool down once 
it generates any heat.


Re: 12" Powerbook fan always on

Postby Florian Zschocke » Fri, 25 Feb 2005 17:06:09 GMT

Hm, that the PB gets warm is normal. But it should not get hot. If it gets 
hot the fan has to start. Did you make a clean install of 10.3 ?
Did you zap the PRAM and the NVRAM ?
So, zap both, make a clean install of OSX, don't install any additional 
software. If the problem persist, there may be something wrong with your 


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