kernel_task takes all of CPU, even after restore

Discussion in 'MacBook Air' started by scenemissing, Nov 7, 2011.

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  1. scenemissing, Nov 7, 2011

    scenemissing macrumors member

    Joined:
    Jun 18, 2010
    #1
    I just wanted to see if anyone had seen this before, but I suspect I will have to take it in to get serviced. My 2011 13" Air has the following symptoms:

    Fan goes to max a few seconds after boot
    Mouse is stuttery
    kernel_task taking up 320% of CPU or more (which i'm sure is causing the above fan and stuttering problems)


    I've done a clean restore already and the problem persists. I've also reset PRAM and PMU.

    Anything left to try other than a HW problem?
     
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  2. spacedrabbit, Nov 7, 2011

    spacedrabbit macrumors member

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    Nov 7, 2011
    #2
    bad cpu/logicboard/thermal sensor. it doesn't really matter, it's likely all the same part on that model of MBA.
     
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  3. Roman2K~, Nov 7, 2011

    Roman2K~ macrumors 6502a

    Joined:
    Mar 11, 2011
    #3
    How long has the computer been up for? Maybe OS X is just performing scheduled heavy maintenance tasks. What do the logs say ("Console" app)?
     
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  4. spacedrabbit, Nov 7, 2011

    spacedrabbit macrumors member

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    Nov 7, 2011
    #4
    very possible

    on a clean installation the only process i can think off that will tax the cpu is mds/mdworker for spotlight cataloging
     
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  5. scenemissing, Nov 7, 2011

    scenemissing thread starter macrumors member

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    Jun 18, 2010
    #5
    Now it gets stranger... I do not get the problem when booting off of a clone of a different 2011 Air (10.7.1 - mostly clean system from work)

    I swear that I fully erased the partition when doing the restore - I formatted it using disk utility after baking up data to an external drive and then did the Lion net restore. I had to do the full initial setup and I did not restore my data.

    I guess I will keep messing with it.
     
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  6. hondavtec, Apr 18, 2012

    hondavtec macrumors newbie

    Joined:
    Dec 4, 2009
    #6
    IOPlatformPluginFamily.kext

    I had the same problem, removing IOPlatformPluginFamily.kext in root/System/Library/Extensions and rebooting solved this issue for me...
     
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