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

This is not a hardware issue. Grant, the exact problem is that there is no simple Hardware fix.

There are plenty people who had their entire motherboards replaced and still had the problem.

Plus a ton of work to backup data and restore the machine.

I know this from first hand experience.

Also, this issue does not occur in bootcamp, which it would have to if it were (purely) hardware related.

[Edited by Moderator]

I found the solution for my similar problems (about 10) Kernel Panic restarts a day) berried in the forums:

Disable Handoff in system preferences -> general -> handoff

I went ahead and turned off handoff and have not had a single crash in 3 days

Thanks

see attached file

Performed all of the above and still the same kernel panic issues. Now Apple has my computer in for repairs, it is going on 2 weeks now on hold at Apple for an ordered part that has not arrived, apparently the error messages reflect a bad logic board that needs replacing. Very frustrating.

Hi,

I think it's a graphic driver bug. You should report it directly to Apple.

You may need to let Memtest run stand-alone for a WEEK to find a difficult RAM error. One pass is almost never enough, start with overnight.

Have you tried to disable Power Nap?

Hi here,

try to disable power.nap it usually does the trick

I think you have a RAM memory error.

How long did you let Memtest run? was this standalone or under MacOS?

Drivers have no business accessing memory allocation queues. They should be in a separate protected space.

Hi Christian,

I'm in a very similar situation. Slightly lesser spec on the MBP and two LG Ultrawide 5K Thunderbolt displays; same behaviour in regards to kernal panics.

I also have two other problems;

1. the MBP sometimes doesn't wake up if it is connected to the external display. Opening the lid will either wake up the machine or cause a kernal panic (Fans and restart as you describe)
2. The MBP doesn't detect the screens adequate resolution when waking up

Does this happen to you as well ?

In my case, I found that this is caused (or at least aggravated) by parallels.

As you can see here: https://discussions.apple.com/thread/250878229?answerId=252321460022 thousand of users are having issues with the MacBook Pro 16-inch, overheating, kernel panics, external monitor not working, it seems to be a software/driver issue but it's been 3 months and 2 MacOS updates already and the problem is still there.

Before I do all of that I've started with switching off the power-nap, will see if jus that solves is as indicated in some other threads I've visited.

Pretty poor of Apple to have this bug on their flagship MacBook...

Exact same problem. I received my unit last night, and immediately could reproduce the kernel panic problems outlined in your post. If connected to my external display, and the unit sleeps, immediate kernel panic, unless I disconnect the external display first. Absolutely unacceptable problem for a $5k machine.

Same as you - modifying power save options, graphics switching, etc, do not solve this problem. The only thing that's helped is either A) leaving the lid open, or B) disconnecting the external display prior to the unit sleeping.

I have absolutely zero patience for this. My much less substantial work Thinkpad P52 reliably goes to sleep, wakes up, and drives my external display. I'll be returning the unit immediately.

Update: Just had first fail to shutdown in two days now...one of 7 maybe.

Next is to empty trash and quit all programs, wait 30 seconds before shutdown.

Maybe you should have the Genius Bar take a look at it, and bring a copy of one of those Panic reports.