27" Cinema Display Sound Issues

You can add me now to the list of ****** off 27" user's with this stupid audio problem. How could this have gotten past QA?

+1. Mine is connected to a 17" MacbookPro (mid-2009). Apple should acknowledge this and let us now if it will be fixed in a coming software update.

One more victim here.

I have the 27" ACD and experiencing both issue with the controls and loss of sound and I haven't even tested the microphone. Power toggle works but is not a permanent solution.

Called Apple Care but in my case they told me that they do not know anything about it. I just hope it is something that can be fixed with a software update although at one point one of the Apple Care guys referred to it as a "hardware issue"

Fingers crossed ...

<z/>

Message was edited by: zonak

Same here ;-(

Same problem here 😟

Message was edited by: Tedeka

Another one: Same here... ;-/

Same problem : sound stop working after 24-48 hours.

I have the same problem. After about 48 hours I had to do a hard reset of the screen. My setup is a Macbook later 2008, meaning that the audio goes via USB. Hope there soon will be a fix for this problem for all models!

Add me to the list of people experiencing this problem. Just tried to unplug the monitor per feedback on this thread and that seemed to restore sound. Hope there is a permanent fix coming. Also have had issues with reconnecting MacBook Pro to monitor and getting very long delays to get a login prompt back to system - sometime 5 minutes or longer. Nice monitor but disappointed with performance.

besides unplugging the display this procedure works for me to restore the sound.
Go to Sound Preference Pane.
Change the output from DisplayPort to USB.
Press Volume up / down to check if it worked.
Change the output back to DisplayPort.

I also notice the sluggish behavior of the USB port.
JFYI I am on a 2010 MacPro with a ATI 5870.

Anyone who doesn't have a 2010 machine doesn't have the option of choosing DisplayPort output as anything prior to this doesn't support audio output via the MiniDisplay Port.

2009 and prior machines have USB output as the only option.

'norman', the apple support guy i spoke to, now had a brilliant idea: grab my computer + ACD, bring it to an apple store and have a 'genius' look at it. i should be warned though, that the 'genius' can only analyze the problem, if present on location. most likely, however, my computer is broken and the display i fine (quote 'norman'; in the same call he admitted that the problem is known to his superior).
my take away:
1. i can call myself lucky that apple is not producing 30" ACDs anymore, but only 'ultra-portable' 27 inchers
2. 'norman' didn't fully understand that unplugging the ACD fixes the problem for 2-3 days. so he either expects me to sit with the genius at the bar for a couple of days or just didn't care as long as he wouldn't be bothered.

I guess i should follow normans advice and just buy a new MBP. mine is already 10 months old anyway...

***? is there a 'sweep-it-under-the-carpet'-policy in order to avoid an ACD-gate (which it is for me already)?

sorry guys, i know this post didn't help you, but i had to vent my anger.

Exact same issue here. With Mac Pro 2008 and a ATI 5770.

Unplugging the power to the Display solves the problem (temporary).

That is exactly why I gave up calling Apple care.

They suggested the same to me, but if I cannot reproduce the issue I am just going to make a fool out of myself. I went there numerous times and I am at my 6-th replacement due to different issue and now on top of everything the sound issues started occurring.

This is very frustrating and although we vent here let me tell you that no one from Apple is considering any of these posts because for them the forums are just unconfirmed noise as one of their representatives qualified it.

Lets just hope there is some software update that will resolve this.


<z/>

I'm wondering how many of us are concentrated, say, in SF Bay Area? Maybe flash mob showing up with our little 27" boxes at one of the Apple stores and forming a line would give little more confirmed noise and get some publicity we need?..

Just 10 people with boxes would make enough of a show I'd guess.