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dell latitude e6420 OSX Sierra (10.12.6). Sound problems


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Good day everyone.

Some time ago I've installed OSX Sierra on my dell e6420. 

Everything worked just perfect.

But during this week I found out some bug - when I connect headphones to laptop sound goes through the internal speaker from time to time. 

And I have to reboot system and connect headphones once again. And maybe then sound goes through the headphones.

The bug happens randomly.

Please help me find out what the salvation is.


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Thank everyone help!

2 hours ago, Jake Lo said:

With Headphone plugged in, place system to sleep, then wake it up. Audio should switch over to Headphone

Mr Jake Lo,it seems this solution works!

But is there any logical explanation why this bug happens?

And is there any other solution like using different kext or smth else?

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