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fplanque Author

Level 1

8 points

Mac Pro with Dell UP2414Q Sleep Wake Issue

Hi,

I have *two* Dell UP2414Q displays connected to a new Mac Pro, both using Display Port 1.2 (MST) setting in order to get 4K @ 60Hz.

Works fine. Except Google Chrome which is really lame at redrawing all these pixels when you scroll up/down.

The issue is: when the displays go to sleep for a longer period of time (actually it's probably when the Mac Pro itself has gone to sleep) and I wake the system up, the Dells sometimes won't wake up!

And if I start fiddling with the display buttons I will get a half image (left half of the screen). Same problem on each display except sometime it's the first one that doesn't wake up, sometimes it's the second one and sometimes it's both. Unfortunately the situation where they both wake up is extremely rare 😟

Has anyone else had similar troubles?

Note: I have had similar sleep wake issues with just one UP2414Q connected.

I'm running OS X 10.9.4 (of course).

I'm also having a 3rd smaller display connected though a DVI adapter. That one wakes up 100% of the time. I previously had 3 of these and they did always wake up all 3 without issues.

-Francois.

Posted on Jul 13, 2014 6:15 PM

49 replies

Didring

Level 1

8 points

Jun 15, 2015 4:37 AM in response to eludwig

I've got a MacBook pro (15 inch) from 2015. If I change this setting I don't get the problem with the UP2414Q not waking up when I wake my MBP from sleep. I'm sorry it doesn't work for you, maybe someone else have better luck. I just thought I wanted to share what solved the problem for me.

eludwig

Level 1

24 points

Jun 15, 2015 7:48 AM in response to Didring

@Didring, don't get me wrong. I am not getting on your case at all. At this point, any improvement as far as this issue goes is all good!

I am merely asking what the setting *does* (or is supposed to do).

When you set this to Monitor Sleep: Off, what happens? Does the monitor stay awake when you sleep the mac?

Does it go into "light sleep" versus full, deep power sleep mode?

I'd just want to know what the setting is supposed to do. I haven't seen any difference in behavior with the setting on or off, so I was wondering what others saw.

Thanks, and no offense intended! 😀

Jul 21, 2016 10:45 AM in response to fplanque

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.

Dec 15, 2017 6:23 AM in response to IntraMind

It seems over the past month or so this issue has been resolved. My only guess is apple fixed it in a software update. Nothing else changed. Odd.

Mac Pro with Dell UP2414Q Sleep Wake Issue