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mesq

macrumors member
Original poster
Jan 11, 2010
81
1
Hi there,

When I was using Logic on my 3 week old i5 macbook pro I noticed that it was running really slow. So i checked activity monitor and a system process called kernel_task is taking up up to 200% CPU activity.

What's going on? I've searched alot and there doesn't seem to be an answer to this?
 
Do you have any devices attached...?
Also, have you tried a reboot if it fixes the issue.

You might wanna also check out system logs in Console.
 
No devices attached -

Of course I have tried a reboot.

I've looked in console but have no idea what is happening there?
 
Well it is happening straight after booting up and the mac is cool to the touch. Not even warm. But I will install SMCfancontrol and see what happens...
 
Well it is happening straight after booting up and the mac is cool to the touch. Not even warm. But I will install SMCfancontrol and see what happens...

Reset your PRAM/SMC.
 
Well Fan Control says it is 0 degrees celcius running around 6000rpm fanspeed.
 
Well resetting Pram has fixed it - I wonder what has caused this to happen? Could it be something I installed - because I uninstalled pretty much everything. grrr how annoying. Anyway totally glad it is fixed :) I knew this site was good for more than Waiting for arrandale :p
 
So The resetting pram thing was only a stop gap solution as it the problem is now back :(
 
So - deleting the login programs the problem seems to be fixed for now...
 
Sorry not to be a complete noob, but I've been wondering, I've seen this before on my mac too, where certain tasks take a lot of cpu activity, and its clearly adding to more than 100%. My logical brain doesn't comprehend this. Can anyone please explain why the cpu activity goes over 100%.
 
Multiple cores. Each one goes to 100%.

Since the new i5/i7 have hyperthreading or whatever it's called, it looks as if there are 4 processors in those machines. Just now I was running 370% :D
 
Ok So Vant was right - after doing a hardware test an error has come up which Apple care said is a logic board error. My 3 week old i5 macbook pro is now at the Genius bar hopefully getting fixed promptly.
 
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