Q: Volume control problem in Lion

thanks juna, was easy to do, and worked great.

This worked for me too. But only by editing the file in Terminal. Editing with a graphical editor had no effect.

Thanks

Hi I can confirm the ssd impact I switched to an SSD 2 weeks ago, and from time to time the volume control is greyed out on start-up. Never had any problem before.

Plugging/unplugging an earphone does fix it temporarily as well as restarting coreaudiod.

Thanks danb1974, this work for me.

But, after i do this, i have a new problem:

I start my MBP, the free space on startup disk about 90GB on 120GB total, but after that about 20minute, the free space decrease to at less 300MB, system alert "Your startup disk not enought space...." and remind me force close some app.

Find on Active Monitor, i see that disk space eating by the Finder app (Private mem and Virtual mem increase very quickly) so free space lose after short time.

Everybody can tell me why and help me resolve this problem.

Thanks all

This worked right off the bat, thanks very much, I was doing my nut trying to get it working.

Com'on Apple lets get things like this sorted before the update leave Cupertino.

Well, I never had this problem until today when I upgraded to 10.7.2, so obviously that's not a fix.

I'm on a 2011 MacBook Pro with an SSD drive.

Yes, i upgraded to 10.7.2 and both "Volume control problem" and "Finder eating large diskspace" are resolved.

Thanks all

This plist file is completely missing

How would i create one?

Worked perfectly!  Thanks

I found this in System Preferences -> Keyboard:

If the box is checked next to "Use all F1, F2, etc. keys as standars function keys," then a footnote reads, "When this option is selected, press the Fn key to use the special features printed on each key."

I held down the Fn key and then pressed F10, F11, or F1 and it worked perfectly!

I managed to fix my speakers by reinstalling Lion. First I restarted the system, held down the Command key and the 'R' key until I got the Mac OS x Utilies screen. These are seveal options. First I did a Disk repair but it didnt fix it. So i tried the Reinstall Mac OS X. This did the trick and I now have my speakers working again!!

I'm in the same situation. I have no output/input device in any audio settings. I tried:

• safe mode,
• reinstall system,
• removed some files,
• modified some audio files (e.g. part of KeepAlive),
• restarted MBA so many times
• restarted PRAM
• etc.

and nothing to helps me. I have MBA 1.1 with OS X Lion. Please help.

what a weird problem never had it but looks like a kind of script bug.

my simple solution:

background: i just had the same problem on a 2010 macbook pro, running 10.7.3. i had been listening to music via headphones, but when i pulled the headphone cord out of the computer, suddenly i could no longer control the volume via the mac's dedicated keys. interestingly, i also noticed a fairly bright, red light coming out of the headphone jack.

so, i was preparing to try the fixes mentioned in this thread, when i stumbled upon a solution:

- i plugged the headphones back in to the computer and started playing some music.

- while the music was playing, i adjusted the volume.

- finally, while the music was still playing, i removed the headphones from the jack, and this time, the volume buttons continued to work.