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atmcclain Level 1 (0 points)
I received my new display last week - was working great, including the sound. Now, I can't get any audio output out of the display at all. (Switching to the built-in internal speaker works fine, so I know it's not a general issue.) I installed the relevant software update soon after plugging in the display.

This seems like a software issue to me because some other things are weird. When the audio output is set to Display Audio, changing the volume up and down is very slow instead of instant. It actually takes a few seconds to register the up or down volume keypress. If I drag the volume slider in system preferences > Audio, I even see the wheel icon spinning for a while. Although no volume setting results in any sound output.

I restarted the computer and unplugged / replugged both the mini display port and the USB connection. Any ideas?

(The display part works fine, BTW!)

Thanks - ATM

Mac Mini (not the latest one but one generation previous), Mac OS X (10.6.4)
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