Level 1

16 points

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

I just got my fully spec-ed out 16" MBP today with 2.4 i9, 5500M 8GB, 64 GB RAM, 4TB HD. I did not install from a migration...just ran updates and am on 10.15.1, so it's a stock install...very clean. I noticed that when I was docked to my two UltraFine 5K displays with the computer lid closed and I would restart the computer, just as the machine was restarting the screen would shut off, the fans would ramp up to 100% for a second and the machine would restart. What let me know that it had a kernel panic is that when it would start back up, there would be a message saying "that your computer has restarted due to a problem." The report that it would create is attached below.

Now doing some testing I was able to prove that it would only happen when the lid was closed and two screens were plugged in. It would not do it if both screens were plugged in and the lid was open. Any ideas?

I did run a hardware diagnostic and it came back clean. Aside from this, the machine is smoking fast.

Thanks for the help.

Kernel Panic

MacBook Pro with Touch Bar

Posted on Nov 21, 2019 12:31 AM

Top-ranking reply

TheRealCasper

Level 1

22 points

Posted on Jun 17, 2020 3:11 PM

Oh... when updating OS you have to enable and disable power nap again. Really weird, but i works.

I have told Apple about this. They called me the other day when my Machine had created a crash report (after updating to 10.15.5). I solved the problem again with flipping power nap on/off. It is properly a wrong state in updated smc/NVRAM thats get set correct when flipping power nap on/off.

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98 replies

Apr 2, 2020 6:58 AM in response to Nat_c

There should be an adequate supply of service parts available at an Apple depot if you arrange to have it sent in for a repair.

What part of the world are you in? who told you parts are not available?

Apr 3, 2020 8:59 AM in response to gmiles

gmiles wrote:

...

refuses to tell me what exactly will be repaired.

Over the last five years, Apple has been moving to fewer assemblies of greater complexity.

The only appropriate thing to be repaired (by replacement) is the mainboard, which now contains the processor, System Management Controller/T2 chip, graphics chips, graphics RAM, main RAM and Boot drive.

When all that has been replaced, your computer will be just like a brand new one..

gmiles

Level 1

4 points

Apr 23, 2020 12:03 PM in response to DPJ

Yes, but if it were a bad run of shipped computers, and I sent my computer in to Apple and had the logic board replaced, as well as the Touch ID board, then the problem should be fixed. But the kernel panics continue after having these components replaced.

It appears to be the same kernel panic issues others in the forum are experiencing under the conditions described. The issue described for this situation has been going on for some time now without resolution in this case, and others as described, no one has suggested the forum be used as law or stated it is a widespread event that I'm aware of.

Jun 17, 2020 2:13 PM in response to Thom Wood

Are you 100% sure you have disabled the “Power Nap option when plugged in”? Not all the other options... not on batteries... but disable power nap when plugged in!

I have seen this on two MacBook Pro 16, and this little trick solved the problem on both machines. The problem came back when updating from 10.15.4 to 10.15.5 and But you have to do exactly as described!

layolz

Level 1

8 points

Apr 3, 2020 11:26 AM in response to christian222

Had a sleep wake issue on my brand new Macbook pro 16 inch. Found the solution: https://discussions.apple.com/thread/251231863

DrStupid

Level 1

4 points

Apr 22, 2020 4:01 AM in response to DrStupid

Three days after switching off the power-nap, I've experienced no restarts.

Safari is snappier too.

Will toggle it back on and see if the issues resume. Will report back.

Apr 23, 2020 12:25 PM in response to luca1975

Did you disable it on both power and batteries? You have to do both unless you are always on power!

Jun 17, 2020 6:00 PM in response to Thom Wood

The community has no more solutions to offer you.

It's time To use the 'Contact Support' link at the top of every community forum page and arrange for service.

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

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