Kernel Panic on 16" i9 MBPwRD

FWIW, Automatic graphic switching didn’t have a measurable impact on frequency in my tests.

I’m actually trying to reproduce the bug right now so I can submit verbose logs and sysdiagnose to Apple. Even w/ power nap enabled (when on battery and plugged in), I’ve had no crashes in ~48 hours. Does anybody know of a way to reproduce this bug more frequently (or reliably)?

Rozak my reboot when sleep did not come back after re-enabling power nap.

I have been running for 7 days with intense use and with Power Nap re-enabled without any problems at all. 10.15.4

So I can’t reproduce.

Very interesting!!

I simply can't provoke reboots and CPU / GPU Panics again. I have enabled power nap again (for 12 days now) but am getting no restarts at sleep. Have all kinds of software installed. Also things that should sync at sleep, but may not have pushed the system as hard as you. But mysterious that it rebooted as a clean install with no additional software, and now doesn't do it with 70 programs installed, including google drives etc. I will try your approach with repair Photo.app library to provoke intensive workload at sleep.

Thank you for a good and thorough reporting.

NP -- happy to help! I had a similar week-long streak without crashes; certainly made troubleshooting a lot more difficult!

I should probably add a few quick words of caution for anybody else wishing to reproduce this bug by repairing the Photos library:

1. Since the Photos repair (Cmd+Opt while opening) last night, my laptop has crashed every time I wake it from sleep (much like when I first upgraded to 10.15.4). The repair/sync process usually takes ~3-5 days for me (my library has 13k photos/368GB, and my ISP is 400mbps x 50mbps).
2. Be sure to make a backup copy of your Photos library before repairing -- don't rely on iCloud!
3. I'm currently seeing some very strange glitches in Photos.app; the worst is that, if I delete a photo while I'm viewing it, it actually removes the photo immediately preceding it from my library. But I've experienced this on 10.15.0 (RTA has been pending bug fix since December), so it might be an issue with my iCloud library...

I'm curious if the common denominator here is iCloud Photos sync, iCloud storage in general (e.g. iCloud Drive, Messages, etc.), or anything during power nap (e.g. Time Machine). Anyway, I'm about to test with power nap disabled again to see if it impacts the frequency of kernel panics...

Is there a way to remove the "Solved" tag? It certainly isn't solved yet.

Experiencing the same issues. Thought it was my USB Hub, since it seemed to crash only when it was plugged in. But no, at least it wasn't just that. Mind you I also have my time machine back up drive plugged into the hub, and that would've been one of those things that cues up during power nap.

Hope Apple can get this fixed (and the screen color changing after some wakes).

Crash on "wake from sleep". Basically I opened the lid, keyboard lit up but screen unresponsive. About 10 seconds later the reboot cycle occurred.

Same as everyone else - I posted the kernel panic logs earlier.

@Thimme: Thanks, added your FB# to the list!

@Jensche21: Just to clarify, I believe that kernel panic log was just the CrashReporter output, which is *generally* safe to post, and the best way to confirm we’re hitting the same bug. But still good advice not to post system logs without redacting personal info. please note that I asked others who encounter the same bug to collect a sysdiagnose, upload it to a new FBA case, and post the FB# here so I can add it to the list. This is just my personal attempt to help expedite the triage/reproduce/fix/release process. Apologies for any added noise from this thread. Hopefully engineering will get back to us soon w/ an update, but I have no idea what the turn around time is.

@jwesley07: No problem! I’ve written my fair share of software bugs over my career, so it’s the least I can do! :)

Hi, just wanted to say thanks for looking at this so deeply and for all the effort you must have put in on issue raising etc. I'm on an almost brand new macbook pro 16 inch max spec and it just started making it so that every time I came back to my computer I was greeted with the message about not shutting down properly. Reading your helpful insight into the matter has saved me from the pain and misery of talking to apple who will no doubt deny that this is even a thing which has happened to anyone (just like they did with the dodgy butterfly keyboards). Thanks again and hope you have a top day!

I have the same issue for weeks now with met 5K UltraFine LG display, crashes after everysleep. I tried clean install, no backups and the same issue.

Do any here have also problems with bluetooth? My Apple Bleutooth keyboard, mouse (logitech) and Apple Magic 2 trackpad as also a lot of issues. They told me today to go to the service center for a replacement or repair.... But i still think this is a software issue.

Has anyone tried the 10.15.5 Beta 3 or 4? Did this fix the issue?

The problem is, Apple did not mention this issue in the 10.15.5 patch notes.

https://mrmacintosh.com/10-15-4-update-wake-from-sleep-kernel-panic-in-16-mbpro-2019/

Vrtx0, I know NOTHING about how or why my iMac works, so I won't be of any help to anyone regarding this issue. However, upon reading this particular entry of yours, I remembered that my symptoms didn't commence immediately upon upgrading to 10.15.4, but a few weeks afterwards when I turned on iCloud Photos on my iMac to sync my photos in iCloud to my iMac. Up to that point, my machine was working perfectly. Just thought I'd pass that info along to you. Thanks for all the research you've performed and info you've provided to all of us here in this discussion.

The answers in your link is very wrong. I have disabled powernap (under battery and connected to power). I still get this crash a few times every week. I have NO hardware attached to my MacBook Pro retina from 2015.

D’oh, thanks @Wally5280! Could you post the latest kernel panic here at your convenience?

Just got my 16” MBP back from the service center last night, and started loading ~400 gigs of photos from iCloud with power nap enabled this morning. I’ll post back with an update ASAP as well.

Side note: Photos metadata is now missing for all of my non-iPhone photos. I reported sporadic issues w/ metadata in October and have an RTA still pending bug fix, but I found it odd that this issue has multiplied...