LG UltraFine 4K Display issues macbook pro Sleep

So I have a brand new MacBook Pro 15inch max memory, max video memory. I have two of the new LG UltraFine 4K Displays. When my machine comes back from sleep the primary monitor will not come back. I can type my password to login even though the screen is blank. I have to unplug the monitor and replug it in to get the display back. Its bad enough I can't daisy chain the two screens but how can I at least avoid having to unplug the monitor several times a day.

MacBook Pro with Retina display, macOS Sierra (10.12.1)

Posted on Nov 28, 2016 3:47 PM

54 replies

Jan 24, 2017 10:44 AM in response to arpst0rm

I have installed 10.12.3 and reset NVRAM and SMC and still no luck. Apple has agreed to take back all of their junk so I am returning the MBP and (2) LG Ultrafine 4K monitors.

vmlinux

Level 1

4 points

Feb 8, 2017 11:34 AM in response to xsima78

System Preferences, Energy Saver and uncheck Automatic Graphics Switching and both monitors came to life !

farr-mbp

Level 1

4 points

Feb 8, 2017 12:31 PM in response to vmlinux

Brilliant (so to speak). This solved the problem. Thank you very much. I hope the AppleCare folks and the Geniuses at the Apple Stores will learn from you.

Feb 9, 2017 10:13 AM in response to vmlinux

What hardware/software are you running? I do not see an option for automatic graphics switching.

Dimlock

Level 1

4 points

Feb 9, 2017 10:38 AM in response to rherman23

I think this just applies to 15" models with dedicated graphics. Not 13" with on-board

wilks

Level 1

10 points

Feb 18, 2017 11:56 AM in response to arpst0rm

Quit the LG app and see if you still have the issues. It worked for me and I'm issue free for 3 days.

Apr 25, 2017 6:44 AM in response to SpankR

Welcome to the club. To my knowledge, Apple has been totally unresponsive to this issue.

onghiem

Level 1

4 points

May 24, 2017 9:19 AM in response to vmlinux

I disabled the graphic switching but it didn't fix the issue.

MacOS 10.12.5

MacBook Pro (Retina, 15-inch, Early 2013)

guopi

Level 1

4 points

Aug 22, 2017 8:02 PM in response to vmlinux

Thanks vmlinux!!

This is the solution to the problem!

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LG UltraFine 4K Display issues macbook pro Sleep