Q: Mini display port to HDMI problem

Mario/anyone,

I don't have arrangement mirror etc when I go to system preferences:

For display go to SYSTEM PREFERENCES, DISPLAYS, ARRANGEMENT, and CHECK BOX MIRROR DISPLAYS.

For sound go to SYSTEM PREFERENCES, SOUND, OUTPUT, and CLICK ON YOUR TV'S NAME

My TV name doesn't show up anywhere either.

just received my Kanex HDMI to MPD cable, tried turing off the Vizio and the MacBPro plugged the cable into HDMI port that my cable works thru and the one the bluray wors through.

I do have the "miniy display at the top by the "airport" thing.....

any help is appreciated.

I am beginning to believe this is an issue with Apple's MiniDisplay port and something in its copy protection circuitry.

I have a new 2011 Mac Mini and a new MacbookPro and both of them cannot display their screens on a Vizio E260MV (1080p res) via an MDP-->HDMI cable (integrated adapter). Since the Mac Mini has a true HDMI port, I can use a normal HDMI cable and it works with nice clarity.

But try to make either work with the cursed MiniDisplay port, and there's nothing but "no signal detected". If I unplug and re-plug in the cable from the TV, the mac's screens flickers but then fail to push a proper signal to the TV.

I blame Apple for this. What nonsense that we all have to do this song and dance to make a connection work, with failed cables, etc. MiniDisplay port serves no one but Apple. This fragile connector has go to go.

EDIT

Another discussion reply has suggestions from a DELL support forum.

I'll give it a try soon and post back.

https://discussions.apple.com/message/17170417#17170417

looking forward to a solution

i figured out how to get sound thru but video playback is a complete mystery

What if my TV name is not displayed.....??

I got the MDP to work with a little adapter that cost less than the shipping.....I have the display up on the 55" HDTV Visio.....but sound still only works through the laptop speakers....

thx

You can get audio through the Mini DisplayPort only on a MacBook made after April 2010. With the MacBook that's the Mid 2010  model 7,1, with the MacBook Pro that's the Mid 2010 model 6,1 or later.

If you have the Mini displayPort on an earlier model you can use the Monoprice adapter which uses the USB port to get audio.  http://www.monoprice.com/products/product.asp?c_id=104&cp_id=10428&cs_id=1042802 &p_id=5969&seq=1&format=2

I didn't get mirror display either until I made sure that I was plugged into the tv at the same time.Then it all popped up and I now have both sound and video. Greatly relieved and thank you all for the helpful tips.

Hope this helps!!

Didn't work for me, none of it has. This is a bug that apple needs to fix, I don't think this is hardware related.

Hi - I recently updated the firmware on my iMac (running Lion) and now it won't detect my LDC TV through the mini-display port to hdmi cable.

The TV detects a hdmi device plugged in, but recieves no signal. Plug in/plug out - reboot - on/off - wait 20 seconds - go make a cup of tea - "detect diplays", all didn't work.

Looks like this is associated with the Lion iMac firmware upgrade, as it always worked before the change. Also, I have a Mid2011 MBP running Snow Lep, and this connects with no problem.

Cheers,

PS - for Mario:

For sound go to SYSTEM PREFERENCES, SOUND, OUTPUT, and CLICK ON YOUR TV'S NAME

- there is a shorter way to do this use "alt-click" on the volume icon on your top  tool bar, this brings up a list of avaliable devices that you can push the sound to.

Got the same problem as you guys, really frustrating. It was working fine for a couple of months, before it suddently stopped working.

I may have missed something here, but honestly I'm not going to sit here and read through 36 pages of posts to find out if you have fixed this problem. Here is what I did. I hope it works. And if this has already been solved, then I'll apologize and just go back to clipping my toenails

System Preferences

Displays

Arrangement

Mirror Displays

worked. thank you

Hi all,

I've been encountering similar problems with my early 2011 Macbook Pro (2.2 GHz Core i7) with Lion 10.7.3. Here's what I've found out so far.

I have connected my MBP to Sony's speaker system, that is connected to my Sony Bravia TV. I'm using using mini display port (Thunderbolt) to HDMI -connector (not Apples own product) to connect the MBP to the speaker system. This has been working perfectly until I rearranged some of my cabeling. After this I keep having trouble using my TV as an external monitor. The speaker system informs that something has been connected to it as it gives a warning how an external sound device has overruled the sound system. This happened also when my configuration was working, so the speaker system definetly detects the MBP and there is nothing wrong with my cabels. I have tried the ALT-CMD-R-P and the SHIFT-CTRL-ALT-POWER resets but these seems to have no effect to remove the problem.

Last night I read about how some users had success by shutting down Wi-Fi, so I did the same. I made sure that my MBP was not connected to my TV, then I shut down my MBP's Wi-Fi transmitter and then I connected the cable to the mini display port. After I clicked detect displays, my laptop gave the blue flickering and supprisingly the TV was showing my desktop. Weird how Wi-Fi could affect to the Thunderbolt, but hey... it's solved - or so I though.

Today I removed the cable to change my laptops position. After reconnecting it, the problem reappeared, the Mac does not recognise my TV as an external device. Detect monitor -button does nothing and while writing this I  don't get that blue screen flickering and neither sound or video is being transferred to the TV. The only effects I can notice after inserting the cable are that the mouse cursor flickers once and that my sound system still gives the same notification how it's system has been overridden. I tried the same trick that worked yesterday with no luck.

I really would like to look at the log of that Thunderbolt device. Does anyone know if that is stored in the Console, or how to get access to it, if the log even exists?

Update to my previous post.

I connected the MDP/Thunderbolt->HDMI-cable directly to my Sony Bravia TV and after 10 seconds of waiting, the Detect Displays button reacted by sharing my screen to the TV. Then I disconnected the cable, reconnected it back to my Sony sound system that has been also been connected to my TV at all times. Again, after 10 seconds of waiting, the Detect Display button reacted giving the blue flicker and now the external TV/monitor is working again. I tested this couple of times and I Detect Displayes was working every time.

I really cannot say anything for sure what was wrong and what fixed my configuration. But I suspect that the Mac creates some sort of device profile of the last external device that was connected to the Mac. And if this profile corrupts or stops working you need to reset it and create a new profile by connecting another device to your Mac.

Like I said, I have no proof of this and it's more like a hunch what happened with my system. If you are experiencing this problem (not the mirroring-thing, that's a user mistake) please try and report if this gave any results for you.

Right. Forget what I said previously. Seems my Mini Display Port connector is indeed busted. After I got my picture transferred to my TV, I still had trouble getting audio working. My Console gave strange messages like:

kernel: Sound assertion ""Graphics vendor supplied 'av-signal-type' property indicates a DVI device with audio capabilities has been attached but cannot be supported."" failed in AppleHDAController at line 2445 goto handler

kernel: IOHIDSystem cursor update overdue. Resending.

kernel: Sound assertion "0 == mAvAssociationStruct.avHeadAssociationStruct[index].functionGroupID" failed in AppleHDAController at line 1500 goto handler

kernel: Sound assertion "0 == mAvAssociationStruct.avHeadAssociationStruct[index].pinComplexID" failed in AppleHDAController at line 1501 goto handler

Then I started twisting my connectors cable and sound came back on and vanished again. Clearly, the connector has had enough - and so have I with these lousy cables. Apple, please update the iTV to steam picture and audio wirelesly so that I can toss these cables away. Sigh.