Why does my 27 inch LED cinema display freeze my Macbook Pro when connecting?

Hi,
I've had a 27 inch cinema display for about 2 years now and love it.
However, a good 50-70% of the time whenever I attach my MacBook Pro, currently 15 inch late 2011, rather than waking up the MBP, it just freezes the computer. The same thing used to happen with my 13 inch MBP.
Any ideas why that is?
thanks,
TT

I finally decided to just take my MBP down to the Apple store and see what would happen if I connected it to one of their new ACDs. At 1st, the guy at the Genius Bar told me that my MBP only supported 1280x800 as a maximum resolution. I told him that was for my MBP screen, and not an external monitor. Finally I convinced him to let me connect my MBP to one of their monitors. Low and behold, looking at the Display settings pane I saw some addtional resolutions, including 2560x1600!
So, now I have confirmed that my MBP can drive an external monitor to a resolution of 2560x1600, using just the single mini displayport connection. I just have to figure out what's wrong with my ACD. Suspecting that my older ACD might not support this higher resolution, I did finally discover that my model only supports a maximum resolution of 1920x1600.
Sorry for all the confusion...

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HT2844 When I plug my LED cinema display into my macbook Pro, the video switches automatically but the audio still plays via the macbook speakers by default. Is there any way to make the audio default to the display audio when plugged in?

Hi,
Pretty much as the tital says really. I'm fed up of having to manually select my audio output every time I plug my macbook pro into me LED display. Can I make it default the audio to the display when plugged in?

yeah- I think so, AlexGrady. see if your machine supports hdmi audio out, it should say under "about this mac"
then buy the correct adapter to your LED display. I think you also have to enable audio out via HDMI, and the adapter has to support HDMI audio passthrough
sorry, that's all I have for now
John b
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yes, the reason it sounds like the electromagnetic interference that induces tones in speaker drivers (such as the microwave energy from cell phones) is because it is essentially the same mechanical action... which is a resonation electromagnetic coil (which will produce tones at whatever frequency it is vibrating).
The specific tones that it is producing are dependant on the electrical properties of the circuits attached to the coupled device - but it's probably possible that particular properties could cause the coils to create more than a single tone (just like a speaker)... on mine the tone didn't quite sound singular, but since the amplitude was analogue to the brightness i guessed that this pointed the transformer.
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I doubt reinstalling the OS will fix your problem but that's you choice.
FWIW I found the following 6-page thread which may be a similar problem to yours but you will have to search through it for relavance or ideas (I didn't read it):
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What model (year) MacBook Pro? Depending on the model, it may have DVI, mini DisplayPort, Thunderbolt, or HDMI video connectors.
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Having the exact same issue, same set of circumstances.

Does anyone have two 24" LED Cinema Displays on their Mac Pro?

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I originally created a thread last September:
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I would be so grateful for some assistance and advice ....
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Click here for a converter. The USB and FireWire ports on the display are there so the display can act as a hub; neither video nor sufficient power is transferred through them.
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Hello All!
As stated, I am trying to connect my 23" Cinema HD display (Model A1082) to a MacBook Pro 5,2. I purchased and am using a DVI to miniport adapter, have the USB plugged in. The third connector - the firewire - is different (when did THAT happen?), and so is not plugged in.
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Booo.
Well, thanks Ann for testing and confiming the issue on a PC as well.
Bug report submitted.
Bummer.

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Why does my 27 inch LED cinema display freeze my Macbook Pro when connecting?

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