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Mini display port to HDMI problem

I have my aluminum Macbook perfectly wired up to my 32 inch RCA HDTV. Nothing will come up on the screen, I've tried detect display, I've tried restarting the computer, unplugging and plugging back in then detect display, turned the tv of and on, but nothing is working. I am currently running Snow Leopard, but when I was on Leopard this process of attaching the TV to the computer just took about 10 minutes of doing desultory processes that I've already described. Any suggestions on how to make it work the first time?

Early 2009 Aluminum Macbook, Mac OS X (10.6.1)

Posted on Sep 28, 2009 1:36 PM

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1,012 replies

Jan 7, 2011 1:04 PM in response to inbeforetheboat

sigh

Same ****, different update. Rolling back to 10.6.2...
It's Apple who's losing money on this, they stop me from using their new Mac Store because of my prioritize towards having my Mac connected to the LCD.

I'd like to state that this is clearly a bug that Apple is aware of, mainly because my Mac refuses to boot up when it's connected to the TV. It's not wrong with my cables, it's not my TVs fault, it's Apple's software **** that causes the whole issue. FIX IT!

Jan 8, 2011 9:32 PM in response to inbeforetheboat

Hey inbeforetheboat, thanks for the brief flicker of hope...

With hope in mine heart I did upgrade but alas to no avail. The screen still flickereth and doeth die. Wouldst that thou hadst not bit the apple of desire in THE FIRST PLACE! Urgggh.

In other words the problem (for me at least) remains. My late 2010 macbook pro STILL will not detect my LCDTV after the 10.6.5 update, despite the 10.6.6 release.

Come on Mac we're waiting...

Jan 9, 2011 10:53 AM in response to Ponponhead

Problem solved! I was reading through this forum and one posting caught my eye. They mentioned using gfxCardStatus which I am also using. I had it set to "Intel only" so I set it to "Dynamic Switching" and low and behold it worked! Also, a quick way to set the audio out is to option-click the volume icon on the task bar and select the TV as the output device. I hope this helps someone else.

Jan 9, 2011 11:47 AM in response to soulminer

Thanks for bringing that to our attention soulminer!

I'd missed the posting about Cody's neat little app that helps Unibody MacBook Pro users configure/switch the graphics Card being used. I installed it from http://codykrieger.com/gfxCardStatus/ and it revealed an interesting phenomenon - I couldn't force the MBP into intel mode while the HDMI + MDP adapter was connected to LCDTV!

I was finally able to switch into intel mode WITHOUT the HDMI + MDP adapter plugged in to the LCDTV, tried again and this time it retained intel (apparently) but STILL didn't detect the LCDTV.

I say "apparently" because with the HDMI cable still plugged in I switched to NVIDIA to try that setting again, but then COULDN'T SWITCH BACK TO INTEL until I unplugged the HDMI + MDP adapter.

From this experience I can only deduce that there is something amiss with my INTEL gfx that started with OSX 10.6.5. Is it just me or are there others here able to try this little experiment with similar outcomes?

Looking forward to solving this case Holmes!

Jan 10, 2011 2:09 PM in response to soulminer

I wanted to jump in and see if anyone has any resolutions for MacBook pro models that are pre-2010?

I am very sad to say that today, I just connected a "new to me" 13" MBP to my 23" monitor via a Dynex Mini Displayport to DVI. I had previously connected my aluminum MBP to the DVI connected to my monitors (home office, office, 42" LCD tv, and 100+" HDTV projector). I am used to two screens for work and big screen viewing for HULU. I am getting the same flickering screen!

The only reason I "upgraded" was to be able to use 8gb RAM. Some upgrade!!!

It's not the cable, as my other MBP is flawless. i doubt its the adapter, as I bought 3 of them!

I tried the gfxCardStatus, but the software isn't compatible with my late 2009 MBP.

I'm running 10.6.6.

Id' hate to go back to my non-unibody MBP...or worse, dust off my windows setup.

Jan 12, 2011 12:03 AM in response to osugirl04

Hi osugirl04,

Oh, if only my problem were that simple! You need to go to display preferences and select arrangement on your primary monitor. Then check "mirror displays". That'll show your desktop on both your computer and your LCD. Alternatively if your displays are showing in your menu bar you can just click "turn on mirroring". If you want to shift your desktop from one monitor to the other rather than mirroring them you simply drag the white bar on the monitor indicator in the arrangement configuration window from one blue monitor indicator over to the other.

Hope that helped!

Jan 12, 2011 7:46 AM in response to Ponponhead

I just wanted to throw my 2 cents in here... Same issue happened to me on an early 2010 MBP using Moshi Displayport -> HDMI adapter to both a ViewSonic 20" LCD and Sony 40" LCD. Suddenly one day it just stopped working. gfxCardStatus, and any other possible fixes wouldn't work.

I realized that if I pull on the Moshi adapter towards the rear of my computer while the 2nd display is being detected, then it detects the display every time. So my issue sounds like an problem with the Moshi adapter to me. I haven't had a chance to test another adapter to confirm this though. But just incase anyone is having troubles with this adapter specifically, maybe a variation on this workaround could help you out!!

Jan 13, 2011 4:34 AM in response to Ponponhead

My new adapter has been delivered last morning, and now it all seens to work perfectly, already rebooted and tested with all possible ways... it just works.

the adapter I bought is the: http://www.kanexlive.com/products/iAdaptV2.html it was a little more expensive than the other adapter (3rd part one) that I had but the issue is gone I think.

I'll try it for a week and I will post if it works or not, but right now it's perfect.

Jan 16, 2011 9:23 AM in response to Ponponhead

Nothing I read in this topic solved the problem.


Finally I discovered how to fix mine problem:

Reboot your Mac with HDMI into TV and MDP-to-HDMI-adapter into your mac nad you may get screen on your tv when OS X finished booting.

My problems were:
-macbook didn't recognize tv
-changing resolution didn't help
-mirror/no mirror didn't matter

So, try to reboot while everything is connected.

PS: I discovered it won't work if you take the adapter out and reinsert... so you must reboot your mac in the right setup and you may not take the adapter out.

Message was edited by: Pau1p: addition

Mini display port to HDMI problem

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