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If you go to Energy Saver in System Preferences, you can select the 'Power Adapter' option, then move the slider to when you want the display to turn off when no activity is detected.

You can also go to Mission Control in System Preferences and setup a hot corner to 'Put Display to Sleep' which is a little different than having the display turn off without sleep mode.

Thanks! Will give that a try tonight. Will probably also reset my SMC and see if that solves the random wake issue.

I just received my 5k. Laptop is the 13 3.3/16/512. I have a Belkin (the one sold by apple) usb-c to ethernet adaptor. When plugged into the 5k screen, i'm getting about 1/2 bandwidth. When plugging into the laptop directly, getting full. See iperf results below:

This appears to be a driver issue. See post below by @maxb that should solve the issue.

Update on Realtek based (Anker, Belking, Cable Matters, Monoprice, etc.) USB-C Ethernet Adapter not getting full speed when connected to the LG5k monitor : the problem is driver related

The driver built-in OSX seams to be the problem

The driver found on Ankers website seams to make the adapter able to go full speed. For now, I'd suggest anyone using one of these adapters to download and install the driver.

I should probably report the bug to Apple so they can fix it in next OS upgrade.
 
His solution appears to only be for the Anker adapters. Is there a driver for the Belkin adapter?

Edit: never mind. Re-read his post and driver is for all Ethernet adapters.

Should work with any Realtek-based adapter. I don't use one myself but I'm sure some would appreciate it if you could update on whether or not the driver updated worked for yours.
 
I have the following issues with a new 13" MBP with touch bar and the LG 5k monitor:

1. If the computer is asleep and closed, and connected to the monitor, I cannot wake it up by using the mouse or keyboard. On my last monitor (Thunderbolt display), I could wake it up this way.
2. If I unplug the monitor while the computer is awake, it will cause the laptop screen to go black. Nothing I do will make it show an image other than blackness, so I need to do a hard reboot.
3. If I plug in the monitor while the computer is awake, I get a crash screen, and the computer reboots.

Is anyone else having these issues? These issues have made it quite unpleasant to work with!
 
I have the following issues with a new 13" MBP with touch bar and the LG 5k monitor:

1. If the computer is asleep and closed, and connected to the monitor, I cannot wake it up by using the mouse or keyboard. On my last monitor (Thunderbolt display), I could wake it up this way.
2. If I unplug the monitor while the computer is awake, it will cause the laptop screen to go black. Nothing I do will make it show an image other than blackness, so I need to do a hard reboot
3. If I plug in the monitor while the computer is awake, I get a crash screen, and the computer reboots.

Is anyone else having these issues? These issues have made it quite unpleasant to work with!

Yes, I had these issues on my 13" as well. Fiddling with the thunderbolt cable seemed to have improved things for a few days but the issues came back when I moved the monitor. Issues combined with an unacceptable amount of wobble forced me to return mine back to Apple last week and stick with my Dell P2415Q.

I am hoping that the next iMac will have Target Display Mode back so I could use it as a display. Or market will have more robust 5K thunderbolt monitor options available. My main issue was that outside of the 14-day return window, I would be at the mercy of LG's goodwill to release firmware to resolve these issues since Apple cannot support this product. I try to keep it all Apple precisely to avoid these headaches and only bought the Dell monitor as there were no other options available. It is not as nice as LG's, but definitely does not cause my otherwise super-stable MacBook to crash at least a few times a day.
 
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I posted this in the owner's thread but maybe I can get some insight here. My ports seem loose. Connections are wobbly. Anyone else have this issue?

Had this same exact issue with the LG 4K monitor. I exchanged it for another 4K that did not exhibit the problem before settling on the LG 5k.

I'd return the display as the wobbly connection will not probably be durable in the long term. Lousy QC in my opinion...
 

Update
on Realtek based (Anker, Belking, Cable Matters, Monoprice, etc.) USB-C Ethernet Adapter not getting full speed when connected to the LG5k monitor : the problem is driver related

The driver built-in OSX seams to be the problem

The driver found on Ankers website seams to make the adapter able to go full speed. For now, I'd suggest anyone using one of these adapters to download and install the driver.

I should probably report the bug to Apple so they can fix it in next OS upgrade.
I installed the driver and now my MBP crashes force restart when connected to the 5k. restoring from time machine now.
I have the Belkin USBC Ethernet adapter.
 
Should work with any Realtek-based adapter. I don't use one myself but I'm sure some would appreciate it if you could update on whether or not the driver updated worked for yours.

The drivers seem to have improved things for me. Before ethernet and wifi got the same speed. Now ethernet gives me a consistent 75MB/s while wifi sometimes hits 75 but drops to 10 and every number in-between while copying.

The Belkin adapter does get really hot, even when the ethernet cable isn't plugged into it.
 
Had this same exact issue with the LG 4K monitor. I exchanged it for another 4K that did not exhibit the problem before settling on the LG 5k.

I'd return the display as the wobbly connection will not probably be durable in the long term. Lousy QC in my opinion...
Just took a trip to the Apple Store. They had two 5k UltraFines on display and both had the same movement of ports. Seems to be the way they designed them.
 
Just took a trip to the Apple Store. They had two 5k UltraFines on display and both had the same movement of ports. Seems to be the way they designed them.
Strange. I don't have the movement in my 5K....
 
Everything works smoothly with my base 13" tbMBP, except the weirdest bug: if I accidentally engage the enlarged pointer by moving my mouse too quickly, even for a split second, it "sticks" and nothing I do (short of a full restart) can get it to go away. It doesn't show up in screenshots, so here's a picture.

Edit: the regular mouse pointer continues functioning as normal. There's just an additional frozen enlarged pointer stuck on the screen from that moment till I restart the machine.
 

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Everything works smoothly with my base 13" tbMBP, except the weirdest bug: if I accidentally engage the enlarged pointer by moving my mouse too quickly, even for a split second, it "sticks" and nothing I do (short of a full restart) can get it to go away. It doesn't show up in screenshots, so here's a picture.

Edit: the regular mouse pointer continues functioning as normal. There's just an additional frozen enlarged pointer stuck on the screen from that moment till I restart the machine.

You can turn that feature off...at least you may want to until Apple fixes the problem.
 
The drivers seem to have improved things for me. Before ethernet and wifi got the same speed. Now ethernet gives me a consistent 75MB/s while wifi sometimes hits 75 but drops to 10 and every number in-between while copying.

The Belkin adapter does get really hot, even when the ethernet cable isn't plugged into it.

How do you monitor the transmission rate of your Wifi connection?
 
When I do as you ask on the 2016 13" (no monitor), the first time it is jerky while everything loads into the mission control view. After the first time it's smooth.

You may want to view the following two videos:
 
Has anyone else noticed a yellow tinge in the corner of their display? When I have a white screen, the bottom right corner area is definitely not pure white like the rest of the display.
 
I have the following issues with a new 13" MBP with touch bar and the LG 5k monitor:

1. If the computer is asleep and closed, and connected to the monitor, I cannot wake it up by using the mouse or keyboard. On my last monitor (Thunderbolt display), I could wake it up this way.
2. If I unplug the monitor while the computer is awake, it will cause the laptop screen to go black. Nothing I do will make it show an image other than blackness, so I need to do a hard reboot.
3. If I plug in the monitor while the computer is awake, I get a crash screen, and the computer reboots.

Is anyone else having these issues? These issues have made it quite unpleasant to work with!



I have exactly the same problems... see the following two videos...

 
I have sleep wake issue with my 15". My work around is to unplug the cable from my 15" before putting it to sleep.
It doesn't always work though. Sometimes it will freeze the laptop the next time you attempt to connect with an external screen (any screen).... This is a complete mess up of the video card driver... Apple did not do a good job this time.
 
Everything works smoothly with my base 13" tbMBP, except the weirdest bug: if I accidentally engage the enlarged pointer by moving my mouse too quickly, even for a split second, it "sticks" and nothing I do (short of a full restart) can get it to go away. It doesn't show up in screenshots, so here's a picture.

Edit: the regular mouse pointer continues functioning as normal. There's just an additional frozen enlarged pointer stuck on the screen from that moment till I restart the machine.

Also happened to me. Unplugging and replugging the monitor solves the issue (without needing a full reboot). That being said, this only happened twice so far (both on the 1st day of my setup). Hasn't happened since.
 
If I leave my MBP connected to the display and put it to sleep, it results in a Kernal panic and the MBP will reboot at some point. When I go back and wake my MBP, it states it had been restarted and the error report comes up with the option to send to Apple.

This has only happened once, but from what I have gathered, there is a fix in the next OSX (beta users have mentioned this). So until then, I just unplug before putting to sleep. A minor hassle.
 
It doesn't always work though. Sometimes it will freeze the laptop the next time you attempt to connect with an external screen (any screen).... This is a complete mess up of the video card driver... Apple did not do a good job this time.

It works for me as long as I disconnect then sleep. and connect after laptop is awake.
 
I have the issue that when I connect the monitor to MBP 2016, it will display only the wallpaper. To get the monitor to display contents, I have to close the laptop and use a Magic keyboard and trackpad. Any ideas what is wrong?
 
I have the issue that when I connect the monitor to MBP 2016, it will display only the wallpaper. To get the monitor to display contents, I have to close the laptop and use a Magic keyboard and trackpad. Any ideas what is wrong?
This is called extended desktop mode and is normal behaviour. But you can make the external display the primary display if you want. This article tells you all about it: https://support.apple.com/en-gb/HT202351.
 
Just got my 5k set up. Editing some photos for the first time and noticed that the 5k is quite a bit warmer than my 15" tbMBP. Dare I say it's even yellowish. Anyone else notice this?

I know I can calibrate but I was hoping that the default profile out of the box would be fine.
 
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