Mini display port to HDMI problem

Okay so I was having these problems too where my screen would just stay black and it took me about an hour to figure out, but it is in the HDMI connection/cable/

I have a 3 day old brand new mac 13 inch with everything updated.

Im using a Rocketfish mini display to HDMI and one of the really expensive insignia HDMI cables and it is now working fine. But before I was using cheap HDMI cables and that seemed to be my problem.

Hope this helps, but you might just have to get better HDMI cables depending on the tv, or maybe the new software requires it. Idk but I hope you guys figure it out cause I was pulling my hair out trying to figure this out.

Goodluck

Ok so I had both machines working fine (older macbook pro and a brand new macbook air) until the OSX Lion update. Cable is not the problem. Everything runs and they both push 480P to the tv. Any other resolution it will show on the TV. Flicker for 10 seconds then drop the signal.

this is a SOFTWARE issue. not a cable issue.

I can prove it buy booting into windows on BOTH machines and it displays perfectly on the tv.

Don't buy an expensive cable!

I have a macbook pro from mid '09 that is connected to an Asus VW266h via hdmi (from monoprice). The connection used to work well; but since a couple of weeks ago, the hdmi stopped working. As everyone else here, I essentially tried all methods/combinations but still in vail. What is even more frustrating is that I have always been a hardcore mac fan, but it looks like that Apple will not do anythig about this issue.

Apple can't help. The problem isn't theirs but with the HDCP handshake. HDMI is a badly designed interface developed for the purpose of controlling content not a superior signal. Since control could not be done with analog connections, HDMI was a new digital alternative to allow whoever wanted to control the content with HDCP.

Problems with HDMI are not usually with the cable but is in the HDCP copy-protection protocol. There was a technical paper from the HDCP group pointing out that some developers of switches are making incorrect assumptions about the way to handle HDMI/HDCP standards. HDMI is being pushed because of the copy protection. High-bandwidth Digital ContentProtection (HDCP) is a form of Digital Rights Management (DRM) developed by Intel Corporation to control digital audio and video content as it travels across Digital Visual Interface (DVI) or High-Definition Multimedia Interface (HDMI) connections. The specification is proprietary, and creating an implementation of HDCP requires a license.

I think while your'e technically right, I do believe Apple *can* help. Many of the problems are related to changes in the OS. E.g. system working great under Leopard, but suddenly not working in Snow or Lion.

In my opinion, if identical hardware works on one OS and not the other, there is a driver / handshake issue that was introduced.

It could even be that Apple is doing it more *technically* correct, but it actually works worse.

Bhavesh

Thanks for the answer @jussiv,

I found a fix!

Sadly, I need 2 screens today so I went to the nearest apple certified seller and bought the macally cable for 38$ and this one is working fine, sound too. I have a 1 month warranty so if apple release a fix for my old cable, I'll send em back the macally one.

Solution: Have so much money that you'll be able to buy peace and a &$%? too expensive cable!

🙂

There seem to be two groups with this problem: those whose macs do not detect their tv at all, and those whose macs detect their tv, but the tv does not recieve the signal. Most of the people who have found fixes didn't say which problem they were having. I'm in the latter camp-- I've got an MBP 8,2 running Lion, an LG LCD tv and an Inland hdmi/mini display adapter. My mac detects the tv--It comes up in my display settings, and I can move my cursor off screen, etc. My tv, however, just says No Signal. My mac is plugged in, and I've tried gfxCardStatus, all the display settings, and all configurations of cords. I've never gotten even a flash of a screen on my tv. Is a more expensive hdmi cable likely to fix it?

Went to the store and bought some expensive HDMI's: no difference. Went to the Apple store and bought Belkin-brand adapter, and it works fine (no sound, but I may be able to find a workaround). At least for me the problem was a bad adapter (Inland brand, I believe, from Fry's).

I'm using the MBP 2011. I had same issue.

I bought cheap cables from amazon.com (minidisplayport and 25' hdmi cables $3 and $7 respectively). couldn't get the tv display no matter what i did...then i unplugged each calbe and the tv power. once i plugged the tv in and connected everything together it all worked. they key was unplugging the tv (as I tried every other combination before that)

this happened twice and the solution was unplugging the tv both times...

i'm using a 40" sony bravia.

I have the same problem, i have macbook pro 13" 374 model, while using os x 10.6 - had no problems with mini dp-hdmi adapter and video-out to Philips TV, after upgrading to OS X Lion - I have the same problems, HDMI doesn't working with any LCD's tried with different cables, adapters - no result, this is definetely software problem, when will Apple fix it? This is not very nice

Ok i just got my mini-DP and couldn't figure it out either.. started messing around with it and stumbled across something that might help. Does the tv screen stay blank or does your mac default background come up, if it comes up try dragging the window over and it should pop up on your screen. Hope this Helps

I too am now seeing this. Though, I was able to upgrade to Lion with my dual monitor configuration, I am now unable to display over mini DVI connector. It recognizes it as attached, the monitor, and available resolutions - no image.

Panasonic 40" and HP 15" monitors running on Mac Pro running ATI Radeon 4870 512MB card. Both monitors used to work interchangably on the main DVI and mini DVI ports. Now, both work on the main DVI connector - neither produce an image on the mini DVI.

This appears to have begun failing somewhere between Sep 2nd and Sep 10th... Don't know exactly, since I've not checked machine daily. Guessing a recent update.

Yep, this definitely worked before one of the previous updates.....

when will there be a fix, seems pretty widespread. MBP Running late versions of OSX are not getting signal out to their external displays despite their Mac recognizing the connected displays.... whats up?

I have the same problem, 2 days ago all work fine, then I update and reboot and can't see anymore output on TV.

All test done, but problem is the update 2011-005. I call apple and say can't do roolback, I need to reinstall the Snow Leopard with the DVD/CD....

i don't understand why on a unix system is not possible to do a rollback to a previous patch/kernel patch....

I have

MACBOOK PRO 2010 version.

Snow Leopard 10.6.8 update

Mini DVI = Cablesson (the adapter!).

I already write to Cablesson company and give this forum page to share this problem, because this is a problem for his company too... the adapter didn't work anymore... 😉 so may be they found a solution i HOPE...

I already test with the program gfxcardStatus (some one post here) but my macbook have only 1 video card output so is not supported....

I try to boot with cable attached and try to open the console logs but no errors found.

I try to put on different's hdmi on TV, i put on TV like "PC" and try to auto sensing but no change...

what I see is on preferences of display is not recognize the TV at all.... because don't see at all any other connected device....

I hope for a fix and not a reinstallation,because I need to do a backup of 250GB and I don't have space for do this.... 😟

Regards

My adapter is Dynex, bought from best buy......so you're saying I have to buy a new adapter? sounds fish to me.... WE NEED A FIX..... not gonna revert to an earlier OS, having to back up and replace all my files in the process......