MacBook Pro 16" Kernal Panic During Restart when Plugged into Dual Monitors

Please keep this forum chain focused and relevant to the issue that is occurring with repeated kernel panics with the MBP16 when connected to monitors/sleep issues. No one is suggesting dismissal of anyone, personally or implied otherwise.

The kernel panics are a reproducible, recorded fact and comparing similar issues that others are having in the same scenario. So yes, this is focused problem that needs further evaluation and resolution.

Please keep this forum chain focused and relevant to the issue that is occurring"

Actually I have been doing just that. I've been offering help and suggestions to you. Remember? I came in when shutting off PowerNap was a suggestion and it shouldn't be a solution. Like I said best of luck but you're showing a bit of passive aggression.

Some one mentioned that this is linked to monitors being connected - this is not the case, I was getting the issue and I don't use external monitors.

Last week I disabled PN as I was getting KP's 2-3 daily and always overnight; the KP's stopped. A couple of days I re-enabled PN, but didn't get a recurrence of the KP as of yet.

Weird.

@luka1975 sadly this doesn't work for many of us.

@mster50 I feel your pain, it really is not what you're hoping for when you spend so much to get the 'best' laptop Apple have to offer. By contrast my MacBook Air 2013 is working just fine, still going strong. At least you can send yours back, I bought mine in February so don't have that option (have to take it to 3rd party servicer for repairs etc, which I can't right now as I have to use this for work).

Hi again @TheRealCasper. Thanks for taking an interest but that doesn't work, not for me at least.

To be doubly sure I just went in, flipped power nap on and off again, just in case I missed it first time. Put the MBP to sleep, plugged into external monitor, 15mins later I hear a whoosh as it crashes again.

On restarting, I'm greeted with the error report: panic(cpu 2 caller 0xffffff8017c9167c): Sleep transition timed out after 180 seconds while calling power state change callbacks. Suspected bundle: com.apple.iokit.IOGraphicsFamily. Thread 0x34687.

So unfortunately, while it may have worked on a couple of machines, it hasn't worked on mine.

Hi Grant. Thanks for your response, I have already contacted support and they haven't been able to help so far, unfortunately.

I was only posting here in case others are experiencing the same issue and wanted to discuss. I think it's also worth keeping the conversation going while the problem persists for multiple users, in case a new solution comes about.

Exact same issue... brand new 16" not a migration and it's crashing daily when it goes to sleep when it's connected to 3 43" displays.

I have the same issue with my new 16" MPB... I am using a 27" LG 5k and a 22" LG 4k.

Of course it has been updated to the latest, this has been happening ever since 10.15.1. So update to 10.15.2 made no difference.

This problem as not been solved as of 10.15.3.

Any update or fix on this? I have same issue, same setup, have been on with support 10 times now. Every time they do same thing Same resets and 24 hours later a panic.

Have an appointment ty. Still curious if any1 has problem solved it without the Genius Bar visit.

Having identical issues. LG states that it is an Apple issue. Have had some discussion with a senior Apple tech advisor, but issue still not resolved.