Mac OS X Lion: Sound problem after unplugging my headset/headphones.

sudo killall coreaudiod

Thank you, it worked fine. 🙂

For information :

My problem appear after upgrading Snow Leopard to Lion (Macbook with Intel high definition audio).

The sound is lost after wake up.

I tried to plug/unplug earphone, but nothing.

@Perr0,

Either your problem is with something besides coreaudiod or it's not restarting itself properly. Make sure after killing it (either method) that it shows up again (takes about 5sec on mine to restart) and that when it does it has a different PID than it did before you killed it.

If it doesn't show up again, then you could try restarting by doing: "sudo coreaudiod". If it is there with the same PID as before, it didn't die. Try killing it again.

If it does come back with a new PID but you still have no audio, then your problem is something completely different. I don't have any idea what else to try.

sudo killall coreaudiod - also worked for me.

fyi - i have no speacial setups or gizmos running. i just had physical headphones plugged in. when i unplugged them built-in audio did not come back. in the sound control panel, it even still said "headphones" in the "type" section for internal speakers.

clearly either an OS bug, or a headphones jack problem. thanks all, good thread!

(btw, bad UX on the forum here - auto correct spelling everywhere except in this text entry box? oh apple...)

Has anyone recenlty installed LogMeIn?

I did, and it hijacked my audio device and as a result...no audio.

Solution:

System Preferences > Audio MIDI Setup 'Right-Click' on Built-in Output > Use this device...

MattGartner's suggestion worked for me (thanks Matt).

For no apparent reason, my sound just stopped working one morning. As Matt suggested, I went to Audio MIDI Setup (via Spotlight), then the Built-in Output tab. I checked the mute tickbox next to the Master Volume channel then unchecked it. My sound magically returned.

Same problem here. I found an easy way to fix it without rebooting. Run terminal and do this:

sudo killall coreaudiod

Was having the same problem, after poking around the web for a bit, came across a MacRumors thread that seems to solve the problem (worked for me) http://forums.macrumors.com/showthread.php?t=1104755

Go to Audio MIDI Setup (search for it in Spotlight)

Go to the Built-in Output and play around with the Format.

For me, 2ch-24bit Integer works for both my headphones and the built-in speakers. Play around with a couple settings, you should notice an immediate change if it works.

i'm experiencing the same problem... sound disabled (no input or output devices available when alt-clicking the volume control) and USB port powered but "deaf".

Even after rebooting the problem persist (in fact it appears right after a reboot).

Tried uninstalling Parallels v7 and did the magic... usb port and sound devices available.

Tried multiple reboots.

Reinstalled PD7 and again no usb and sound after reboot.

There is another solution to reset the Coreaudio.

Hold the ALT Key and right lick the Speaker Icon to quickly switch between available audio ouputs. Most of the time switching one or two times between speakers and USB Audio remedies the problem.

- The problem persists there since Tiger for me

- e.g. starting Toast reliable kills my Z-10 Logitech Speakers and other USB Audio, since whenever.

- Killing Coreaudio works also for me.

I guess it has todo with how certain programs scan the USB Bus.

kyen99, thanks for your attention. coreaudiod does show up again and it has a new PID. So I suppose my problem is not related to it.

I've read some posts before in this thread that Parallels 7 seems to affect audio in Lion and I do have it installed. Uninstalling it seems to solve the problem, but I just can't try that now.

Thanks anyway.

I'm using MBP with OS Lion. The speakers I have are Altec Lansing XT1 (Portable USB-Powered).

After watching a movie last night I just closed the lid without unplugging the speakers. Next day I unplug the speakers and turn MBP on. I could hear the volume adjustment sound but no matter what I played (youtube for instance), there was no sound. So I plugged in the speakers again, went to 'System Preferences > Sound > Output' and chose 'Internal Speakers' which did the job.

Reason I knew the workaround already was because everytime I need to use these speakers, I have to manually select it in 'System Preferences > Sound > Output' anyways.

Hope this info is of some use.

Had this problem since I got my new MBP (Early 2011, 13-inch).

Genius dude recommended I reinstall Lion (resetting PRAM did not work), he emphasized that I should erase the disk and do a complete re-install.

I did that a couple days ago (erased disk, installed 10.7.0, then recovered my stuff with Time Machine), and it was still broken.

Today Software Update pulled down the 10.7.2 update and some other updates, and after reboot, the problem appears to be gone!

Hope it stays this way!

What works for me is the fix suggested to me when I first posted this, and used it again today and it worked again. I have only had to do it a few times in the last several months.

I am using 10.5.8 though.

"Run Activity Monitor and find the process called "coreaudiod", select it and press Quit Process."

Then restart.

NO SOUND AFTER HEADSET FIXEXD!

I had a startup chime so I new my speaker worked.

The sound preference pane had no internal speakers or no output device.

Every sound volume adjustment was greyed-out at max setting.

Theory: IF inserting headset plug into headphone jack kills built-in speakers, AND removing headset plug returns sound to internal speakers, THEN perhaps some kind of a physical cut out switch inside headphone jack gets stuck in off position or even in between on and off positions.

My Solution: I just 'roughly jammed' headset plug in and out headphone jack while watch sound icon in top right menu bar to accidently go black, instead of its constant greyed-out state.

Results: Worked after about 5 'roughly jamming' repetitions ! ! !

Disclaimer: If there's a weak physical aspect in jack, maybe 'roughly jamming' repetitions will break it.

GOOD LUCK, FOLKS!

Hey guys...

All that stuff didnt work for me....

I had to Format my SSD, tried backing up from my newsest backup same problem again.....

I noticed this problem occure after installing CS5.5 master collection or Pro tools....

So what I did was Format the SSD again... Installing Lion... then I chose a back-up from a older date...

WORKED!!!!!

I was then able to instal CS5.5 and Po Toools 10 with no problems....

I would really like to knbow what cused this problem...

Peace.