External screen blackouts on a MacBook 2016

Discussion in 'MacBook' started by ParanoidDroid, Oct 10, 2016.

  1. ParanoidDroid macrumors 6502

    ParanoidDroid

    Joined:
    Sep 15, 2013
    Location:
    Venusville, Mars
    #1
    Hi, I'm having issues with my MacBook 2016 m7 when using any external screen. When connected to any screen, the external screen has random blackouts – like there is a cable disconnect/lost video signal. The screen goes black for a second then comes back. I don't know how to solve this problem.

    I'm using the official USB-C-Digital-AV-Multiport-Adapter from Apple and also tried the MINIX NEO C multiport adapter. At first, I thought there is something wrong with my USB-C port or faulty cables. But after trying all variations of my external equipment (i.e. different HDMI cables – including the one from Apple, different monitors – FullHD and above), obviously it's the MacBook itself. Especially, it gets worse when the Mac is operating at maximum CPU and RAM usage. The usual scenario is: running Illustrator CS6, Photoshop CS6, Lightroom, and Safari with multiple (i.e. 10-20) tabs open at the same time.

    It looks like I'm not the only one suffering:
    https://discussions.apple.com/thread/7500233

    What are my options? Does anybody else have the same problem here, and were you able to find a workaround? I don't want to just return my MacBook yet, because I don't think a replacement will solve this issue.
     
  2. WickedPorter macrumors regular

    WickedPorter

    Joined:
    Sep 28, 2012
    #2
    Very well known issue; hoping for a fix soon. Here's another thread: https://discussions.apple.com/thread/7615336

    The fix seems to be a complete shutdown and reboot. Most people only experience the "flickering" on wake from sleep with an external monitor hooked up.
     
  3. ParanoidDroid thread starter macrumors 6502

    ParanoidDroid

    Joined:
    Sep 15, 2013
    Location:
    Venusville, Mars
    #3
    If it is well known, then why is there not enough outcry on the social media? Did most people stop using external monitors? :eek:
     
  4. WickedPorter macrumors regular

    WickedPorter

    Joined:
    Sep 28, 2012
    #4
    Total guess: It's not a "system down, unusable" issue so I'm guessing not a huge priority for Apple and others, and the workaround is a reboot, which may be acceptable for the majority of potential outcriers (unfortunately.)

    Regardless, it's an incredibly annoying/frustrating bug and definitely bugging you and I! Please post your experience to that thread if you haven't yet, even if it's a simple one liner "I have this issue too." I'm hoping the bigger the thread the more chances Apple will listen/look in to it. Even with the known issue threads, the Genius Bar/Apple Support simply wants to replace the hardware with new hardware that does the exact same thing. I am hoping this is fixed in the next Sierra update... it's got to be something that can be resolved in firmware/software but apparently we need to help convince them that it's a software problem first (if we haven't already).
     
  5. rtchau macrumors newbie

    rtchau

    Joined:
    Nov 15, 2016
    #5
    This was happening to me with 2 different Samsung monitors (HDMI), a BenQ monitor (HDMI), and a Philips monitor (USB-C). It was driving me absolutely insane. However, an SMC reset seems to have fixed it - prior to the reset, the Philips monitor was blanking out 1-2 times a minute, and after the reset, it's been 30 mins with no issues. So definitely give that a go - I might plug the HDMI monitors in as well to see how they behave but so far so good.

    EDIT: Forgot to mention though, it could also just be a sleep issue - e.g. plugging in an external display after having a different display plugged in pre-sleep, and the reboot (for the sake of the SMC reset) may be what has "fixed" it (guess I'll find out soon enough).
     
  6. grinny11 macrumors regular

    Joined:
    Aug 12, 2008
    #6
    Have the same problem. Seems to only be an issue after the computer has been asleep. Really annoying. I now reboot every morning as part of my routine. Oh well!
     
  7. WickedPorter macrumors regular

    WickedPorter

    Joined:
    Sep 28, 2012
    #7

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