Thunderbolt / Mini Display Port Conflict

Discussion in 'MacBook Air' started by hokinabru, Aug 9, 2013.

  1. hokinabru macrumors newbie

    Aug 9, 2013
    On the new 2013 Haswell macbook air, Im having this weird issue where the external display only works on the thunderbolt cinema display. If you use a HDMI or DVI adapter to mini display port, nothing happens.

    The screen will flash blue but then nothing will happen on the external display.

    This started happening after my USB mouse started getting laggy and twitchy so i restarted my macbook, thats when all hell broke loose.
  2. Boyd01 macrumors 68040


    Feb 21, 2012
    New Jersey Pine Barrens
    I am using a really old (2006?) 23" Apple Cinema Display on my brand new 11" MBA. It is connected via a miniDisplayPort to DVI adapter and works perfectly - just like it did on my old 2011 MBA.

    I also have a Seagate Thunderbolt dock that accepts their Desktop Backup Plus drives. The monitor also works fine when I plug it into the dock's pass-thru port.

    Now I did have to wiggle the connector a bit on the dock to get it to work with the external display. But I assume that's a design issue on Seagate's part, the ports are recessed below the surface of the dock for some reason, so the plug doesn't go in as far as I'd like.
  3. hokinabru thread starter macrumors newbie

    Aug 9, 2013
    Im thinking its definitely an issue on my laptop. I reisntalled the OS to no avail.

    The same external display + dongle work on my brothers 2012 macbook air, however, do not work on mine.

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