Unlocking issue with Late 2016 MBP 15"/LG 5k/Apple Watch

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Level 1

4 points

Unlocking issue with Late 2016 MBP 15"/LG 5k/Apple Watch

I am currently running a late 2016 tbMBP 15" 2.6 Radeon Pro 450 with the new LG Ultra Fine 27" 5k monitor. I noticed that I am having very odd behavior with this setup that I wasn't having with my prior LG 27UD88 4k monitor. When I have unlock with Apple Watch enabled in the security settings any time my machine logs in after going to screensaver (immediate password enabled) before the desktop will fully initialize it appears the display is re-detected and several flickers on my 5k and other external display or laptop display happen. I have tried this in several different configurations, single external 5k display connected, multiple 5k displays connected, 4k (usb-c) and 5k (thunderbolt 3) connected, lid shut, lid open. All of these produced the same effect, multiple input flickers and a very delayed login and usable desktop time is upto 10-15 seconds after login. If I disable the ability for my Apple Watch to automatically log me into my machine I can type my password and go straight to my desktop without any flickering. I tried this again with all the combinations as before and everytime login is as quick as when i have no 5k monitor connected. I am running macOS Sierra 10.12.2 (16C67).

Has anyone else experienced this or can replicate this behavior?

MacBook Pro with Retina display, macOS Sierra (10.12.2)

Posted on Dec 29, 2016 12:59 PM

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Answer 1

Dasgooch Author

Level 1

4 points

Dec 30, 2016 8:13 AM in response to Dasgooch

I have fixed this issue by performing an NVRAM reset outlined here:

How to reset NVRAM on your Mac - Apple Support

How to reset NVRAM on late-2016 MacBook Pro models

Follow these steps to reset your Mac computer's NVRAM if you have a MacBook Pro (15-inch, Late 2016), MacBook Pro (13-inch, Late 2016, Four Thunderbolt Ports), or MacBook Pro (13-inch, Late 2016, Two Thunderbolt Ports).

Shut down your Mac.
Find Command (⌘), Option, P, and R on your keyboard.
Turn on your Mac.
Press and hold the Command-Option-P-R keys immediately after you turn on your Mac.
Hold these keys down for at least 20 seconds to ensure that your Mac completes the process correctly.
Release the keys.

After resetting NVRAM, you might need to reconfigure settings for speaker volume, screen resolution, startup disk selection, and time zone information.

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Answer 2

Dasgooch Author

Level 1

4 points

Dec 30, 2016 9:01 AM in response to Dasgooch

I spoke to soon. This only temporarily solved my issue and it has returned. I suspect the NVRAM is involved but not sure how as this has quickly returned after multiple successful tests previously.

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