Kernel Panic on 16" i9 MBPwRD

Did you disable power nap in both tabs in energy saver? As depicted in the image below?

Turn off automatic Graphic switching.

NOTE: THIS ADVICE IS NOT FROM ME, I FOUND THIS FROM ANOTHER APPLE SUPPORT FORM. USE AT YOUR OWN RISK

Sleep issue are often sorted by

resetting the SMC https://support.apple.com/en-us/HT201295

If no resolve—

Try a SafeBoot https://support.apple.com/en-us/HT201262

Takes noticeable longer to get to the login screen, does a 5-15 minute disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc. Login and test. Reboot and test

This test will tell you if third party interference; extensions etc are not loaded in safe boot mode.

If you still need further assistance—

To get a good look at your System config. for conflicts or issues, you can run this trusted utility http://etrecheck.com

If you need help interpreting the report you can post it here in its entirety in the "Additional Text" box in the editing toolbar below, in your reply.

You can set its preference to "Allow full Disk Access", with this you get a digest of issues from the last 7 days that are saved in your system.

I tried now a few things. So its not the problem with peripherals. Tried every possible combination...

Now I found out it has to do with powernap when on the power adapter.

If powernap is off I have no issues.

I've got the same issue with my 16" device and solved it, at least temporarily. My MBP is the cheapest model available.

Interestingly there was a problem with the unlock via Apple Watch at the same time. It simply didn't work.

After processing the SMC-and VRAM-Reset the crashes disappeared, even with the Power Nap on and with the power plug in.

But the unlock with the watch still didn't work.

After shot down, not restart, the watch an the computer everything is fine. I repeat at least temporarily. The unlock ist working and since the shot downs no crashes with and with out the power plug.

There has been a Supplemental update to the macOS10.15.4

see if that resolves your issue:

Download macOS Catalina 10.15.4 Supplemental Update https://support.apple.com/kb/DL2038?locale=en_US

If no resolve.:The work around is to disable PowerNap in

>System Preferences>Energy Saver

My MacBook is new without much app installed, no external monitor and usb c drive and it still reboot overnight/periodically standby after sleep. I had tried follow Apple Support to reinstall the os, completely reinstalled the harddisk (Shift+Option+Command+R), Safe mode (Shift) and all did not work.

I had referred to jwelsye07 reply to disable 'Enable Power Nap while plugged into a power adapter' and it seems works for me so far. will wait for few more days and will call up Apple support and report the case. Obviously is is disappointing with Apple Support do not confirm this issue yet. Seems this is last for a while.

> I'm wondering: Can a "not crashing while app nap is off" rule out a hardware defect

Yeah, given that so many of us are experiencing the same kernel panic while sleeping after updating to 10.15.4 - it's almost 100% going to be a software rather than hardware issue.

If your machine is brand new, and you don't mind reinstalling, perhaps try downgrade to 10.15.3 and report back if that fixes the issue too?

Cautiously optimistic. I've had this issue since I bought this Macbook a month ago. I was getting it 2-3 times in a 24 hour period. I've turned off Powernap and have gone about 18 hours without a kernel panic.

MacBook Pro (16-inch, 2019)

2.4 GHz 8-Core Intel Core i9

32 GB 2667 MHz DDR4

AMD Radeon Pro 5500M 8 GB

And...

Apple multiport adapter

Samsung external monitor

I have the same feeling. Did not use Foto app a long time. Now after importing some images I got the kernel panic error when waking up the power-cable connected device. After disabling power nap everythings seems to be ok.

My son and I have identical 2018 iMacs. At some point, probably 10.15.4, my son's iMac started having kernel panics every time it would go to sleep. Mine has been rock solid. The crash dump starts out similar to what you are seeing:

panic(cpu 0 caller 0xffffff800f615f27): "AMDFramebufferVIB::setPowerState(0xffffff8060e20000 : 0xffffff7f90337d76, 0 -> 1) timed out after 45542 ms"@/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-6153.121.2/iokit/Kernel/IOServicePM.cpp:5296

The only apparent difference being the graphics cpu involved (AMD vs AppleIntel). He's pretty patient, but was starting to get pretty frustrated, so we started really looking at the issue. The last thing we tried was having him switch graphics resolutions. He was pretty happy with the default, so had never changed this, but I had. It has never gone overnight without crashing, but after more than a day, no panics so far.

The thought here is that this routine is looking for a file (preference?) or something in PRAM - maybe both, that doesn't get created unless and until the user makes an initial setting.

I'll post again if there's a panic, but if you don't see anything from me, it's still running fine.

Dan

Can you try disabling Powernap when Poweradapter is connected?

Hey all. For everyone who just wants to get rid of the symptom: turning off power nap changed my scenario from multiple crashes a day to not a single one in three days. Definitely worth a try.

try to disable powernap.

I think problem is something with:

Powernap and GPU Restart.