Monitor with MacBook Pro 2016 not waking up

I have a late 2016 MacBook Pro with 4 USB-C ports and the LG UltraFine 4K Display that Apple is selling. So it is a USB-C to USB-C connection.

The monitor does not have an on/off button, argh. When I wake up the MBP, the LG display does not wake up. I have to go into Display settings of the Systems Preferences and detect new display every time. There is no info on troubleshooting in the documentation (the documentation on the monitor is not very detailed). Only that "The monitor will turn on automatically if the PC is operating normally."

Anyone have a similar situation or advice?

Solution 1:

I had a similar issue. I have two UltraFine 4K monitors connected to a 2016 MacBook Pro. When the Mac went to sleep both displays went to sleep, but only one would wake.

This has been resolved by the latest firmware.

1. Install LG Screen Manager. The LG site is still showing the old version.
2. It will push the most recent version, v2.06.
3. Upgrade your monitor to the latest firmware. (3.11, 3.4, 5226, 3.04, 0.2f)

For some unknown reason, LG appears to have removed the LG screen manager tool from their site. If you are looking for the latest firmware, it can be found via homebrew.

brew cask search lg
brew cask install homebrew/cask-drivers/lg-screen-manager

Solution 2:

In addition to Allan's suggestion in comments, I would also try resetting your NVRAM.

IMPORTANT: The steps for resetting the NVRAM are different for the Late-2016 MacBook Pro models (i.e. different to all other Macs).

For all Late-2016 MacBook Pro models (with and without Touch Bar) follow these steps:

1. Shut down your machine. Yes, a full shut down, not just logging out.
2. Press the power button and then immediately press the commandoptionpr keys.
3. Keep these keys pressed down for at least 20 seconds!
4. Let go of the keys and let your Mac reboot normally.

Note: When you log back in you may need to readjust some of your system preferences (e.g. speaker volume, screen resolution, startup disk selection, time zone information, etc).

[EDIT]

You should also try resetting the SMC. To do this on your MBP, follow these steps:

1. Shut down your computer
2. Keep the MagSafe adapter (power cable) plugged in.
3. Press at the same time shiftoptioncontrol (on the left side of the keyboard) and the power button
4. Let go
5. Turn your computer back on with the power button.