Sound volume problem after upgraded to Lion Mac OS X 10.7? Any help?

I havent streamed iTunes since the Lion upgrade but will fire it up and check. This issue is so different from this thread that you may want to consider starting a new one and paste a link here.

I just got off the phone with apple support. I had the same issue and now I'm fine. Some have suggested PRAM. He also had me to one other thing.

Shut down

After shut down, hold dont shitt, control and option at the same time while pushing the on/off button. The computer SHOULD NOT turn on.

Then do another shut down.

Hold down alt, command, and the P and R at the same time and hit the power on/off button. Hold them all until you hear the chime TWICE.

I hope that helps.

Hey Hotel Joe...

I had been mistaken that I was performing an SMC reset (****-Control-Option-Power) when in fact that is the key combo (Control-Option-Power) that I DID perform. No the system did not start, but it did strobe the front panel LED. Is that what happened on yours?

Im all ears if this is the case, BECAUSE, if so, this is also fixing other items as well and I would like to understand WHAT in fact is being reset.

Best Regards,

Christopher Reynolds, ASQ CRE,PMP,BS IS

Christopher--

All I remember is that he told me the process would reset all my hardward. The second set of key strokes is called a PARM (or something close to that) as I have seen posts about doing that. I know he told me that I had to hold the keys until I heard the SECOND set of tones.

Whatever he had me do, it works now.

That's more information right there

First

The set (Control-Option-Power) Reset for the hardware.

Second

The set (P-R-Alt-Command) PRAM or Parameter RAM. This holds information on the various systems, such as Audio Volume and Type.

So, A general reset and then a PRAM to get things going... very well indeed. I hope Apple is working toward that update fast since this is rather simple in nature to solve.

Far Well Hotel Joe!

Christopher Reynolds, ASQ CRE,PMP,BS IS

http://support.apple.com/kb/HT1379

Contents of PRAM

Some Macintosh computers may not have all the settings described below. For Mac OS X information, refer to Mac

OS X: What's Stored in PRAM?

Status of AppleTalk

Serial Port Configuration and Port definition

Alarm clock setting

Application font

Serial printer location

Autokey rate

Autokey delay

Speaker volume

Attention (beep) sound

Double-click time

Caret blink time (insertion point rate)

Mouse scaling (mouse speed)

Startup disk

Menu blink count

Monitor depth

32-bit addressing

Virtual memory

RAM disk

Disk cache

Tried the SMC reset and resetting the PRAM but the sound to my external speakers is still kaput. Tried deleting the sound preferences files as well.

This is a very ragged problem, I think. Let me explain: when I installed Lion my external speakers worked OK, except, for some reason, the left tweeter. I played around in Audio Midi Setup to see if I could get the left speaker to work, and then all speakers (tweeters, sub-woofer) went mute. The internal speakers remain operative. And one more thing: the general volume slider at the top of the screen sometimes has a little blue aura around the button (as it did in Snow Leopard) and sometimes it doesn't. And it works for my internal speakers, but obviously not for my 'dead' external speakers.

So this seems to me not like a single sound problem that can be tweaked immediately with some new code from Apple. It suggests to me something has unravelled in the sound department with Lion, but not on every computer. So finding what's causing it may take time.

Hopefully there are enough of us with this problem to actually prompt a quick response from Apple. I would hate to have no music for the next three months.

I have taken a look on this issue, and this is what I think :-

1. It is not a hardware issue otherwise rolling back to 10.6.8. Will no work.

2. I saw a little metal “click” on the top of the entrance hole of audio in/out jack, a short term solution is either to insert an earphone or an optical cable and uplug it afterward, which would drive to run the audio driver.

3. Hence, I believe there is a problem only with certain model of MBP, after upgrading to Lion the software fails to “click on” the audio driver of the volume control.

Before, Apple to release the new update to fix this issue, I always insert an Tousling to mini optical adapter (without cable), which helps.

http://www.amazon.com/Toslink-To-Optical-Mini-Adapter/dp/B004T67EZK

And now for the final act...

THE SOLUTION...

Yes folks, after working with the crack team from Apple Care (James and Company) a solution to this issue was discovered.

For all the about issues, it comes to this.

Reboot System

Hold Command+R (Recovery Mode)

In Recover Mode, select Disk Utility (This insures that Macintosh HD is not mounted)

Run

Disk Repair (x2)

Disk Permission Repair (x2)

Restart

If still having issues

Command+R

Install in Place (Reinstall - This takes and replaces any files that may have been overwritten and rewrites them)

After installation, check if system is okay, If not

SMC (Shift+Option+Command+Power)

HW Reset (Command+Option+Power)

PRAM (Option+Command+P+R)

If still not functioning... Here is the FINAL Solution

Since this formula is to take out the grossest of errors on the OS side, Take a moment to create an alternate user with Admin permissions

Log in to this account

If everything is now functioning, the corruption is a hangover from SL and you will need to move all of your data (only the data) to the new account.

Beware of MobileMe.

Before starting the transistion to this account, turn MobileMe off - No Syncing, No iDisk, No Nothing! This will prevent MobileMe from rewriting the corrupt information into your new account.

Collect all of your data, serial numbers for 3rd party Apps, eMail and other items. This will take some time, but it is worth the ride.

Once this is all complete, your system will be rock solid stable.

Christopher Reynolds, ASQ CRE, PMP, BS IS

I have done all the above,

But sadly it does not work.

Thank you so much anyway

Its cost apple 456 dollars on my machine, they replaced my system board and I still have the same issue! maybe that will expedite the patch 🙂

I fianlly solved the problem by changing the False to True on this plist

https://discussions.apple.com/thread/3203808?start=15&tstart=0

I certainly plan on waiting for the next update before going unecessarily "under the hood". That said, by simply reapiring disk permissions with the Disk Utility, the problem seems to have disappeared! I will keep a close eye and report back if I am mistaken or have missed something.

Fingers crossed.

This may not apply to everyone, but on a Mac Pro tower on which I had lost sound on my external speakers after installing Lion I simply switched the cable from the port at the rear to the headphone port at the front, and the sound came back. I swear I had tried this before, but when I was using iTunes. This time I was playing a track on YouTube. Doesn't make sense, I know, but it worked. Have restarted, sound still there. And it's there on iTunes as well.

The greyed out icon is fixed through headphone insertion/removal but the external speakers on the lcd display do not work. if selected they jump back to the MBP 13" internals. And some programs lose sound without warning. So when is this fix coming?