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Apple Notebooks Apple's notebook computers including MacBook Pro, MacBook, MacBook Air, PowerBook, and iBook.

Annoying clicking sound...

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Whenever I run my ibook off of battery power it constantly makes this really annoying clicking sound. It doesn't make this noise when it's plugged in.... Anybody have/had/heard of this problem?
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Mac Specs: 2 x 3.0GHz Quad-Core, 6GB OS X 10.6.8 | 15in MacBook Pro 2.2GHz OS X 10.6.8 | 64GB iPad 2 WiFi

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That is an interesting problem. Here is my guess. Since you you have the problem only when running on battery. I am assuming it has to due with the configuration when running on battery. I am not in front of my powerbook at this time, so I can't look at by settings.
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guess i'll call apple on monday
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My powerbook does the same thing. It seems like the sound takes longer to initialize when on battery power. I've found that it actually hangs the system for the fraction of a second it takes a sound to play. Strange.. :slant:
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After a little more research, I found out why the laptop is exhibiting this behavior when on battery power. For some odd reason, OSX >=10.1.2 shuts off the sound hardware on the laptop when it has been inactive for ~30 seconds. The current workaround is to plug in a set of USB speakers when on battery power.

Here is a link to the official Apple documentation.

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