Plugging in External Monitor disables audio?

Discussion in 'OS X El Capitan (10.11)' started by victorhooi, Oct 23, 2015.

  1. victorhooi macrumors member

    Joined:
    Mar 29, 2011
    #1
    I'm running OSX 10.11.1 (15B42) on a 2015 rMBP 13".

    I have a Dell P2715Q monitor - I'm connecting this via a DisplayPort to Mini-DisplayPort cable to one of the Thunderbolt ports on the Macbook.

    My sound works fine normally.

    However, as soon as I plug in the monitor, OSX seems to disable the sound.

    If I try to adjust the volume, this is what I see:

    [​IMG]

    And of course, sound doesn't work in any apps (Chrome, Skype etc.).

    Any thoughts on what's going on, or how to fix it?

    Or how I can gather more diagnostics on what's happening? Could this be an OSX bug?
     
  2. Autistic Behaviour macrumors member

    Autistic Behaviour

    Joined:
    Sep 9, 2015
    Location:
    montreal
    #2
    you can choose which audio output to use by clicking the option key while clicking the sound icon in menubar
     
  3. victorhooi thread starter macrumors member

    Joined:
    Mar 29, 2011
    #3
    Aha, you're right - I just noticed that it defaulted to trying to push sound via the DisplayPort as well.

    The monitor has a 3.5mm audio out - so I'm guessing it's trying to go rMBP -> DP to Monitor -> 3.5mm out. Not sure it's the best default, but oh well =).
     

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