External monitor clamshell mode weirdness

Discussion in 'MacBook' started by BeeEss, Apr 1, 2016.

  1. BeeEss macrumors newbie

    Sep 27, 2010
    I have an Asus PA248Q external monitor connected via HDMI through the Apple multiport adapter, and I use it in clamshell mode. When the rMB is sleeping, the external monitor keeps cycling in and out of sleep mode - it sleeps, then immediately wakes up to a blank screen, then sleeps again, then wakes up again... over and over until I wake up the rMB. I was hopeful that the mutiport adapter update would fix the problem, but no love. Anybody else have this problem?
  2. RUGGLES99 macrumors 6502

    Feb 9, 2015
    what's the multiport adapter update? i have one but rarely use it.
  3. BeeEss thread starter macrumors newbie

    Sep 27, 2010
    I'm not sure, honestly - Apple just called it an "update." It pops up a window when you plug in the multiport adapter, installs the update, and (in my case) does a painfully slow reboot. I haven't been able to find any details about what it actually does, other than general "improving stability and compatibility." Except it didn't in my case :)
  4. boast macrumors 65816


    Nov 12, 2007
    Phoenix, USA
    Try disabling Power Nap under the power settings.
  5. BeeEss thread starter macrumors newbie

    Sep 27, 2010
    Rats - that was a great suggestion, but the problem persists. I tried turning off the 'wake for network access' option, too.

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4 April 1, 2016