LG UltraFine 4K Display issues macbook pro Sleep

I'm having the same issue. MacBook Pro 15" w/Touch Bar is constantly crashing with LG 4k display connected. Even got a kernel panic. One week with no display connected, and 0 crashes. Called Apple and they weren't able to help. Anyone have a solution or do we just have to wait ?

My Touch Bar buttons also stop responding often (i.e.: single volume and brightness key stop working, but up/down buttons continue to work; entire bar goes black when selecting emoji in Messages) but that's a separate thread I'm sure.

Thanks all,

Dave

Hey, my Touch Bar has exactly the same problems as yours, also the crashing of the MacBook is the same; Apple support couldn't help me either. But I already found a workaround: don't close the lid of your MacBook when you put your Mac to sleep with the LG4K display attached; I had no crashes since I do not close it...

So just put it to sleep via the Apple Menu and do not close the lid, it worked for me.

But still, the situation is very frustrating if you cannot close your MacBook without it crashing, and MUST be addressed by Apple very quickly!

This is an image of the Touch Bar not working: also very frustrating, Apple Support could not help me, only way to put it back to work was pressing the fn key which shows the function keys and then the touch Bar worked again.

What I have discovered is that the display not waking from sleep issue happens when there are two power sources for the MacBook Pro - either two displays providing charging power, or one display and the power adapter. I have a case escalated with Apple Support on this.

Any update on this? I am having these issues too.

unfortunately I'm have ing the same issues. Two LG 4G connected and only one will wake. Even if I leave the lid open I have the same issue. My Mac is also very sluggish after waking.

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Have you tried the new 10.12.3 Beta 4 version of Mac OS X?

I've installed beta 4 and its fixed the issues for me. I have 2 of these monitors and it was always the display 2.

Install the latest public release of Mac OS X Sierra 10.12.3 (from today), it has solved all my problems, same as yours

I have also just installed the latest public release 10.12.3 and all seems to working great now.

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.

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

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.