Ruoyu

Q: with 10.11.2, Mac Pro 2013 will not wake up 4k displays after sleep like before.

I have installed 10.11.2 today and found the Mac Pro will not wake up the 4k displays connected to thunderbolt ports. I tried many kinds of 4k displays including u28e590d, u24e590d, p2716q etc, but none of them would wake up after sleep. the only resolution is to unplug and replug the thunderbolt (display port) cable to a different thunderbolt port.

those displays all work perfectly with 10.11 and 10.11.1.

 

Steps to Reproduce:

1: have a Mac Pro 2013, any configurations and install 10.11.2

2: plug a 4k display like u28e590d to thunderbolt port using mini-displayport cable.

3: let the Mac Pro go sleep

4: when press a key or click the mouse, the Mac Pro will wake up but the 4k display will not wake up.

 

anyone is experiencing the same problem?

Posted on Dec 9, 2015 1:25 AM

Close

Q: with 10.11.2, Mac Pro 2013 will not wake up 4k displays after sleep like before.

  • All replies
  • Helpful answers

first Previous Page 12 of 12
  • by Mac Saint,

    Mac Saint Mac Saint Jul 21, 2016 10:48 AM in response to Ruoyu
    Level 1 (4 points)
    Jul 21, 2016 10:48 AM in response to Ruoyu

    I had the same issue with the Mac Pro late-2013 model and I tried ASUS, DELL and Samsung, all of them had the same issue, they do not wake up when I put the monitor to sleep, but I got lucky and found the only monitor which does.

     

    My setup is 10.10.5 with a Cinema Display + another 4K monitor.

     

    The only monitor which works is LG 31MU97, it is a 31" 4K monitor and it DOES wake up from sleep, after 2 months of getting demo units and trying different setting I was about to give up, this last LG monitor worked like a charm.

     

    I put the Energy Saver setting to 5 minutes for the monitor to go to sleep and after it went to sleep, I waited for another minute to make sure the 4K went to sleep completely, I hit a key on the keyboard, the Cinema Display comes on first and the LG takes about 4 seconds and comes back on, I will take the 4 second delay anytime than not waking up at all.

     

    I bought 10 for my company and all of them work great. No need to fiddle with any settings or anything, but you have to use the Displayport to Thunderbolt cable which comes with the unit, any other cable will not work.

  • by williambsmithjr,

    williambsmithjr williambsmithjr Aug 8, 2016 9:07 AM in response to Mac Saint
    Level 1 (4 points)
    Aug 8, 2016 9:07 AM in response to Mac Saint

    Since November 2015, I have had a MP 2013 running 10.11.5 with a Samsung LU28E590 4k monitor that will not wake. The only reliable/repeatable solution for me is:  1) unplug power cable from MP for about 60 seconds;  2) replug power cable for 15 seconds;  3)  boot MP;  4) cross fingers.  I believe this procedure resets the SMC. Aside from that, all I can do is leave the desktop/monitor/screen saver on 'round the clock.

     

    This is a huge problem, and it's upsetting that Apple has done nothing to address it.

first Previous Page 12 of 12