Volume Buttons not working on Lion

[sdneidich]

My volume buttons are not working. Press volume up or down, and the volume appears, but does not go up or down. Mute does appear to work.

Recommendations please? Thanks!

MBP 2011 i7, 8 GB RAM, 128 gb SSD

 

[minifridge1138]

What audio output are you using? Speakers from the line out? USB audio? Optical out?

When you got to System Preferences -> Sound -> output, what's selected?

 

[sdneidich]

I was just using normal speakers on the MBP.

But it is fixed now. I think it had something to do with "App Tamer," as restarting with it not running fixed the problem.

 

[gmladenov04]

same thing here. i need to restart in order for the buttons to work

 

[derbothaus]

You need to kill coreaudiod. This will bring back functionality without rebooting. In fact usually a reboot makes them unusable again in my experience.

Open Activity Monitor, search for coreaudiod and kill process.
Or open terminal and use top command to find PID and:

sudo kill 5481

Or whatever process number top revealed for coreaudiod.