Be careful buying a minidisplayport adapter

Discussion in 'MacBook Air' started by SheridanMac, Jan 18, 2011.

  1. macrumors newbie

    Jan 13, 2011
    Hi all, just wanted to pass along some information I thought would be helpful. Last week I got my 13" MBA and purchased a mini-displayport to standard displayport adapter from to hook it up to my TV - already had a displayport to hdmi cable that I used with my old laptop, a Lenovo W510. The Lenovo, like the new MBA's, is capable of passing audio through its displayport, and I used it with my HDTV frequently. I figured that all I needed to do the same with my MBA was an adapter to go from mini to standard size.

    Well it didn't work. Video passed fine, but no audio. I troubleshooted the hell out of it to no avail. My HDTV showed up fine under displays, but under system preferences sound tab the only device that showed up was my MBA internal speaker.

    I then decided to go in a different direction and bought a minidisplayport to hdmi adapter from Amazon to use with an extra hdmi cable that I already have. This one had customer reviews confirming that it could pass audio. Got it yesterday, and works like a charm.

    (Also nice is that it cost $7.70 versus $34.99 for the one on sale at Apple! Seriously, WTF Apple, that's some Best Buy level shadiness.)
  2. macrumors 6502

    Feb 14, 2008
    I'm guessing it did not work at first because you were doing a 2 adapter solution.
  3. macrumors member

    Apr 22, 2010
    I hope you're not suggesting that spending more money is better. Monoprice is a great place to get cables. Their prices are low, their quality is top notch, and their descriptions are accurate. The problem was the OP didn't read the description carefully:

    Displayport cable:
    HDMI cable:
    HDMI adapter:

    The descriptions all say they do not support passing audio. I bought mine from a direct-from-China websites for $5 w/ FS. It's still working flawlessly, including passing audio.
  4. macrumors 6502

    Blue Fox

    Apr 13, 2009
    HDMI Audio via Dynex Mini Displayport Dongle


    The Dynex Mini Display port to HDMI dongle that you can get at Best Buy provides video and audio via HDMI. I've confirmed this via my 27" iMac running 10.6.6. You need to change the output in the sound preferences to HDMI of course, but it does indeed work. I'm listening to my iTunes through my TV right now as I type! :D

  5. macrumors member

    Nov 3, 2010
  6. SheridanMac, Jan 19, 2011
    Last edited: Jan 19, 2011

    thread starter macrumors newbie

    Jan 13, 2011
    I did read carefully. The product I bought had no such disclaimer. Take a look: mini displayport male to displayport female adapter. Furthermore, the knowledgebase section of the product listing states the opposite

    "Question: Q: Does this adapter carry audio?
    Answer: A: Yes, if both the source device and receiving device both support the displayport audio format."

    It makes no sense to me to spend $35 on that when you can get the exact same functionality for $7. Here's the link to the one I bought :
    cable matters minidisplayport to hdmi. This is a commodity item, not something where the apple premium is justified.
  7. macrumors member

    Nov 3, 2010
    It does if you live in the UK where there isnt such store as best buy :p
  8. afd
    macrumors 6502a

    Apr 12, 2005
    best buy in uk
  9. thread starter macrumors newbie

    Jan 13, 2011
    Even in the UK you have an option that is almost 1/5 the price of the one apple sells and does the exact same thing.
  10. macrumors member

    Apr 22, 2010
    I'm sorry. That really sucks, and I hope they give you renumeration. Tell them if they don't, I'll also stop shopping there.
  11. macrumors 65816

    Adidas Addict

    Sep 9, 2008
  12. rubberwheels, Jan 19, 2011
    Last edited: Jan 19, 2011

    macrumors member

    Jan 25, 2010
    According to your picture of the output, it states that your device has no output controls. how does your sound go through then? cause mine has the same thing except it's a samsung tv.

    EDIT: Okay, i can say that audio works despite what it says there. mine is similar and my audio works.
  13. macrumors 6502a


    Jun 7, 2008
    Minneapolis, MN
    It means you cant do anything about it that it just passes it through to the tv :Facepalm:
  14. macrumors 6502

    Feb 14, 2008
    I'm not suggesting that at all, I'm simply suggesting that daisy chaining adapters is sometimes problematic. If you need to go from MDP to HDMI, then just buy a $7 cable to do that rather than going MDP to DP then DP to HDMI. I think that's what the OP did anyway, and I was saying that it does not surprise me that "fixed" the issue.
  15. macrumors 65816

    Nov 3, 2009
    I have a Monoprice HDMI adapter. Its a piece of junk. Really cheap looking with huge gaps in the side.
  16. macrumors regular

    Aug 22, 2008
    Aaah brilliant! Just ordered one myself now. Thanks, much appreciated!
  17. macrumors 68020


    Apr 3, 2009
    This is the cables i get from mono price, they carry audio on everything i have tried , including 3 projectors and 3 tv's

    Attached Files:

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