No sound from MacBook Pro under Lion OS X after the automatic logout.

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No sound from MacBook Pro under Lion OS X after the automatic logout.

When I go idle, my MacBook Pro does the typical log out....& prompts me for my password to get back in. I have sound previous to this, but, when I log back in, all the sound is gone. This frequently started happening with Internet videos (youtube) / flash getting no sound, but now it's the entire system. In order to get sound, I have to shut down my entire notebook and start back up.

When I click the sound effects in the System Preferences > Sound .... They do work.

Any solution to this sound issue?

If you need more information please ask.

Posted on Oct 1, 2011 8:22 PM

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Answer 1

abovelol Author

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Oct 3, 2011 4:21 PM in response to abovelol

Bump.

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Answer 2

Oct 7, 2011 8:18 PM in response to abovelol

Go to System Preferences > Sound > Output Tab and make sure that either "Internal Speakers" or "Headphone Port" are selected.

Just happened to me. Not sure why. But this resolved it.

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Answer 3

abovelol Author

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Oct 7, 2011 8:21 PM in response to thegoat54

It was already slected. That was not the issue. I just reset my NVRAM & PRAM, hopefully it fixes. I'll find out tomorrow.

Thank you.

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Answer 4

Apr 4, 2012 11:13 PM in response to abovelol

Same happened to me any luck?

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Answer 5

Apr 11, 2012 11:40 PM in response to Alexwm125

Same here. PRAM reset works - for awhile. Getting tired of resetting PRAM.

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Answer 6

Martull

Level 1

8 points

Apr 16, 2012 8:21 AM in response to Canyonlight

Hi. Same here. I haven't try the PRAM reset, but rebooting the system works, with the obvius corresponding time consumption 😟.

The system has two user accounts that are running simultaneously, my wife’s with Chrome, VLC, and other image and video tools (no professional ones). On my profile I have chrome, vlc, jdownloader, mail, mkvtools and stuff like that.

I first thought that one app was blocking the access to the sound card to the other apps, but if I turn off all of them and log out one user, the problem persists. So I end up rebooting the system…

Any help will be appreciated

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Answer 7

Sep 10, 2012 4:35 PM in response to abovelol

Go to system Preference, click on sound. At the bottom you will see " Use audio port for sound input. change that to sound output and it will start working.

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Answer 8

jonahhh

Level 1

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Oct 1, 2012 11:18 PM in response to abovelol

Anyone ever figure this out? It's happening to me too. What's interesting is that I can record the audio and play it back after I restart, I just can't hear it. Seems to be related to sleeping with a lot or you tube videos or maybe sound generating programs in general.

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Answer 9

Aug 17, 2013 10:20 PM in response to abovelol

I had same problem.... found my sound was going to one of my Apple TV units. Not sure how that switched.

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