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mdp hdmi adapter on new 2011 imac disables cec?

B

Benni-chan

macrumors newbie
Original poster
Apr 29, 2010
28
0
Hi,

i have 2 different MDP -> HDMI adapters. One supports Audio, the other doesn't. Both of them work fine with my Macbook Pro.
But when I connect them to the Thunderbolt Ports of my new iMac, the CEC connection between my TV and my receiver doesn't work anymore.

Anybody with the same problem?
Can someone suggest an adapter which will work with audio and won't disable the CEC connection?
 
You need a thunderbolt adapter, which isn't available yet. Check out Kanex, they appear to be the only company actively working on something at the moment.
 
You don't need a thunderbolt adaptor to use an external display with the 2011 iMac. I'm not sure of an adaptor that will fix your issue, but I'm sure it exists.
 
audio and video works with me, too.
the problem is, that as soon as i plug the adapter into the imac, the cec connection between my tv and my receiver stops working. meaning, i can't control the receiver with my tv remote etc...
edit: when i plug the adapter into my macbook pro, the cec connection keeps working...
 
Weird....

I bought a 'budget cable' for $6 that carried signal, but I don't use cec, so I can't comment on whether that will work. It's really strange that would create that issue based on a new machine.

Keep us posted!
 
I am experiencing the same problem with my macbook pro. When I plug it into my Philips TV, CEC (called EasyLink by Philips) stops working. Just had a support technician at my home. He explained me that if pin 13 is not properly connected at some device, the CEC feature will stop working for the whole HDMI bus.

My MDP-to-HDMI adapter is from KanaaN (bought it from Amazon and it was not very expensive). Which one are you using that works for your macbook pro?
 
i have two cheap no name adapters, which work with my 2010 macbook pro.
do you have a thunderbolt equipped macbook pro or an older version?
 
well, then i believe something in the thunderbolt connection disrupts the cec signal.
maybe we have to wait for new thunderbolt->hdmi adapters...
 
Is there any news on this?

I have the exact same problem with a Loewe Xelos TV, a Loewe AudioVision DVD player and a 2011 MacBook Air: As soon as I plug in the MacBook the CEC link between the two Loewe devices stops working.

I too am using a KanaaN cable from Amazon.

Has anyone any experience with a similar setup and the Moshi or Belkin DisplayPort to HDMI adapters from the Apple Store?
 
i've removed the cec-pin in my hdmi adapter and now my tv and my receiver can communicate again :)

you need to remove pin 13 (see http://en.wikipedia.org/wiki/Hdmi ).
Everything else still works, but the mac doesn't disrupt the cec signals of other devices anymore.
 
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