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  • ahostmadsen Level 2 (280 points)
    Yes, obviously some MBAs have the problem, others not. But, as the previous poster reports, many people have reported that even replacing logic board and fan does not necessarily solve the problem, so it's a mystery why some MBAs have it and others not.

    Here is my experience: My computer was idling in my A/Ced office, with Safari open on a news cite. There was an add running moderately intensive animation. That alone was enough to make kernel_task go crazy! Part of the problem was that had both an ethernet connection and airport, and my experience is that that is heating up the computer. But this is how my day is spent: painstakingly making sure nothing uses cpu, shutting down programs that use more than a few percent cpu (e.g., iWeb uses around 7% cpu even when idle). Not very user friendly.
  • Glorfindeal Level 6 (9,330 points)
    I think that the later versions, especially the rev c, which I have, don't exhibit the problems as much. I imagine Apple made design changes to try to alleviate the problems in later revs.

  • carlinw Level 1 (0 points)
    I am having this problem as well. It happen both when my Air is not hooked up to anything and when it's connected to a 24" external display, external mouse, external keyboard, 10-BaseT adapter.

    Chrome and Firefox seem to the problem more likely to happen then when I use Safari. Reboots sometime solve the problem.
  • x+y=z Level 1 (0 points)
    I have had the same problem off and on through various OS upgrades. Now running 10.6.1. kernel_task will comsume 140% CPU for a while, then will drop down to say 6%. Have not been able to definitively correlate it to anything, and have found no fix. Help!! Aaaaaarrrggh!!!
  • alex1994ale Level 1 (0 points)
    I along with the hundreds of others that have replied to this post have the problem with kernel task and its ridiculous CPU usage. I have seen the application "Coolbook" mentioned and am wondering if this will solve the problem.

  • x+y=z Level 1 (0 points)
    Apple needs to respond to this. Are you listening? It is serious.

    -- long time apple fan
  • ahostmadsen Level 2 (280 points)
    My MBA has become progressively worse. Right now, the only thing going on is running time machine while watching NY Times home page, and this has made kernel_task go crazy. So, you cannot even browse the web while TM is running? This is, to note, in my A/Ced office, with the MBA elevated to allow for airflow. Anyway, these days the fan runs constantly even when nothing is going on on the computer. Sometimes the noise drives me so crazy that I shut down the computer and go for a walk until it has cooled down.

    Question: any suggestions for a very compact, quite desktop fan? At home, I have a fan running behind the computer, and that seems to be the only way to avoid the kernel_task problem. But that fan is slightly noisy.
  • x+y=z Level 1 (0 points)
    I have done two things recently that have helped. (1) Installed coolbook and slightly undervolted:
    798 Mhz, 0.925 v
    1586 Mhz, 1.000 v
    1862 Mhz, 1.050 v
    After three days of normal use, unlike before, I had no runaway kernel task gobbling 140% of resources. (2) I noticed that the fan was still coming on under light loads (6000+ rpm: noisy). Today I took it along to the Apple Store when taking care of something else. They cleaned out the inside of the machine, extract a large dustball nestled up against the CPU heatsink. Now the fan is running at 2500 rpm, which with my ears and environment is silent. My guess is that either one of these measures would be sufficient. In any case, I am now a happy camper.
  • crtalen2 Level 1 (0 points)
    Can't even watch a show on Hulu with my macbook air because of the kernel task problem. Apple needs to fix this.
  • Slapguts Level 1 (0 points)
    15 pages, and no solution?

    I'm covered by AppleCare until 2011, maybe I should start taking it in every couple weeks.

    I've tried Coolbook, but if Coolbook is active, my temps stay at 66 degrees celsius, and the fans run full blast. If I disable Coolbook, I get temps around 55 degrees, and the fans come back down, but I also get the occasional kernal_task flaws that make the computer unusable. Closing the lid, letting it sleep, and coming back a few minutes later seems to fix it. That is NOT a solution, though.
  • theputer Level 1 (0 points)
    You are a genius. Renaming that flash file just made by macbook air like new again!
  • Mfoster Level 1 (65 points)
    What? What and where is the flash file, and what do I name it?
  • Simone37 Level 1 (0 points)
    I just went to Genius Bar this week, they took the MacBook Air,
    is a refurbished 1.6GHz DDR2, 80GB from Jan 09!
    When freshly installed and updated with 10.6.2 the kernel_task issue
    was autonatically on, whatever the temperature of the CPU.

    Coolbook would apparently solve the issue, but 1 month from the end of the warranty I cannot rely only on a software from a third party that may not
    work well with the next update of the OSX.

    I will let you know what do they do, I suggested the change of Logic Board,
    as in forum was one of the most successful way to solve the problem, even if
    was not always solving it.
  • Ryan Level 7 (20,215 points)
    I have a MacBook Pro (10.6.2), and ever since connecting it to a Samsung HDTV, kernal_task spikes every few seconds and actually causes the mouse to pause briefly and then skip across the screen.

    Rebooting fixes it for awhile. This is getting really annoying.
  • mrad01 Level 1 (0 points)
    Coolbook fixed it for me.

    I was having major issues - it was almost unusable. My machine is out of warranty. $10 to solve it - cheap.


    On adaptor:
    1200MHz: 0.9750V
    1400MHz: 0.9875V
    1600MHz: 0.9875V

    On battery:
    800MHz: 0.9000V
    1200MHz: 0.9750V
    1400MHz: 0.9875V
    1600MHz: 0.9875V

    Thermal limit: 85C (the max)
    Throttling level: high