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OS X - Operating System General OS operation information and support

10.7.3 upgrade killed my audio...


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kbalch

 
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I just upgraded from 10.7.2 to 10.7.3 today via the combo update and have lost all audio. I'm not getting any sound from either the built-in speakers, my speaker system, or my headphones.

The Sound pref pane doesn't show any options other than 'Digital Out', my task bar volume slider is grayed out, and my keyboard shortcut volume controls are also non-functional.

I've reset the PRAM to no effect.

Any other ideas, or is my volume toast until Apple addresses this with the next incremental release?

Thanks for any and all assistance!

Regards,
Ken

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chscag

 
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Did you backup before applying the update? No? If not, boot to your Recovery partition and reinstall Lion. The Lion reinstall will do an automatic archive and install. Let's see if that fixes it.
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Lifeisabeach

 
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I would simply try re-applying the update for the moment. If that doesn't work, we can try digging further.


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I would download and re-install the combo update. If that does not resolve it I would do what chscag suggested.

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kbalch

 
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Thanks, guys.

Yes, I did have a current backup (via Time Machine). Rather than just return to 10.7.2, I reinstalled from the 10.7.3 combo updater. No change.

I then repaired permissions from Disk Utility. No change.

I then unplugged my external speakers and rebooted. That (possibly in combination with one or both of the other fixes tried) has solved the problem. All of my volume controls are back and, when I plug my speakers and/or headphones back in, everything works as it should.

Thanks for the suggestions, guys; I really appreciate the help! :-)

Ken

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1969TriumphT120R.com
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pendlewitch

 
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Quote:
Originally Posted by kbalch View Post
Thanks, guys.

Yes, I did have a current backup (via Time Machine). Rather than just return to 10.7.2, I reinstalled from the 10.7.3 combo updater. No change.

I then repaired permissions from Disk Utility. No change.

I then unplugged my external speakers and rebooted. That (possibly in combination with one or both of the other fixes tried) has solved the problem. All of my volume controls are back and, when I plug my speakers and/or headphones back in, everything works as it should.

Thanks for the suggestions, guys; I really appreciate the help! :-)

Ken
I would hazard a guess that the internals of the speaker socket are operating as a latching switch and that it needs to be reset which is what you did when you removed the jack from the externals.

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kbalch

 
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Quote:
Originally Posted by pendlewitch View Post
I would hazard a guess that the internals of the speaker socket are operating as a latching switch and that it needs to be reset which is what you did when you removed the jack from the externals.
Sounds reasonable to me. I wonder what it was about the OS upgrade that triggered the problem? I suppose it could simply be a temporal coincidence, but that strains credulity. Mine, at least. :-)

Ken

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pendlewitch

 
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Quote:
Originally Posted by kbalch View Post
Sounds reasonable to me. I wonder what it was about the OS upgrade that triggered the problem? I suppose it could simply be a temporal coincidence, but that strains credulity. Mine, at least. :-)

Ken
Hi Ken,
I can't be certain but my guess is that the contacts in the jack socket have normally closed switches connected to them. Plug in a jack and the switches will open, shutting off the audio to the internal speakers. Conflict could have occurred during the power interrupt/restart regime.

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kbalch

 
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Makes sense. I'll buy it. :-)

Ken

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pendlewitch

 
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Ha..cheers

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