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Avoid high kernel_task utilization on 2005 PowerBooks
Authored by: beauhartshorne on Aug 18, '05 06:30:17PM

I was able to confirm the original poster's problem, even after installing the 2005-007 security update. Wetzel's suggestion brings the kernel_task CPU use down to about 0.3% instantly:

sudo kextunload /System/Library/Extensions/AppleUSBTopCase.kext/Contents/PlugIns/AppleUSBTrackpad.kext/

To get your trackpad back, just run this command (your kernel_task CPU use will go back to about 10% instantly):

sudo kextload /System/Library/Extensions/AppleUSBTopCase.kext/Contents/PlugIns/AppleUSBTrackpad.kext/

I've submitted a bug with Apple, the ref # is: 4222723.



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Avoid high kernel_task utilization on 2005 PowerBooks
Authored by: janrpeters on Sep 01, '05 07:28:39PM

I submitted this bug to apple and they have given it the status "closed". Does any of you know whether the bug has been resolved?



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Avoid high kernel_task utilization on 2005 PowerBooks
Authored by: cssbz on Oct 27, '05 07:20:32AM
Save your work before you try the above hint, because
sudo kextload /System/Library/Extensions/AppleUSBTopCase.kext/Contents/PlugIns/AppleUSBTrackpad.kext/
just caused my machine to give a kernel panic. I've tried it again after a reboot, and this time, it succeeded in unloading the extension, and kernel_task CPU usage has gone down correspondingly.

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