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  • lupunus Level 3 Level 3 (995 points)

    rluciano wrote:

     

    This is a consistent solutionfor me. Weird. If only the display is asleep it wakes fine. But if the computer and display are both asleep, the display does not awaken. If the display is on (not asleep) and the computer is woken from sleep all works well.

     

    Woo-hoo

    Very interesting information, especially the first and the second finding.

     

    The third point is clear.

    In this case no "wake up" burst have to be interpreted by the displays interface.

     

     

    Thanks for that!

     

     

    Lupunus

  • Thomas Voßen Level 1 Level 1 (65 points)

    Well, I've found a workaround for my Mac Mini (which didn't wake the 30" ACD connected with the Mini DisplayPort to Dual-Link DVI Adapter from Apple):

     

    If I wake the Mac Mini via the Bluetooth Keyboard or the Bluetooth Mouse, the display stays in stand-by mode.

     

    But if I use the power button at the back of the Mac Mini, the display leaves the stand-by mode just fine. I prefer this workaround much more over my previous workaround—which was unplugging either the USB connector or the MDP connector of the MDP2DLDVI adapter from the Mac Mini after each wake from sleep.

     

    So for those whose Mac Mini's display has issues which the wake from sleep—I suggest you might want to try to wake the Mac Mini with a short push of the rear power button. Hope this helps.

  • lupunus Level 3 Level 3 (995 points)

    Thomas Voßen wrote:

     

    Well, I've found a workaround for my Mac Mini (which didn't wake the 30" ACD connected with the Mini DisplayPort to Dual-Link DVI Adapter from Apple):

    [...]

    But if I use the power button at the back of the Mac Mini, the display leaves the stand-by mode just fine.

    Found that the same "work around" works on portables too as the issue is not limited to MacMini.

     

    If you look around you will find the same description for iMac, MacBook and MacBook Pro but never read about on Mac Pro systems.

     

    It seems that the wake up via mouse or keyboard did not push the system to send a sufficient wake up burst to connected displays.

     

    I was able to reproduce that issue with my new MacBook Pro even on a old CRT, a projector and a new flatpanel.
    Interestingly the wake up via mouse or keyboard works on most projectors I had to work with in the last 5 month.

     

    By the way, I had the same issue with my older MacBook since 2008 but rarely and if on flatpanels only.

     

     

    Lupunus

  • bluetortilla Level 1 Level 1 (25 points)

    control-eject, then return (shutdown) works for me, but the shutdown occurs very quickly so I wonder if I'm actually triggering a forced shut down. Where can I look to find that info?

     

    Not much to do I guess until there's an update. It would seem likely that it's a Thunderbolt port problem.

  • Chule Level 1 Level 1 (0 points)

    I found a solution. Press several times the space bar and the display wakes fine!

  • coolkid99 Level 1 Level 1 (0 points)

    Thanks a bunch,... this has been a real pain for me for months, the quick push of the power button seems to do the trick, should have thought of trying this. Happy Happy Happy!! ;o)

  • applesnail Level 1 Level 1 (0 points)

    I had a Dell monitor connected to my 2012 Mac mini via VGA and it wouldn't wake up when I pressed keyboard, mouse and power buttons, unplugged everything, and reset on the SMC on the Mac Mini. Then I changed to a monitor with an HDMI connection and that has done the trick.

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