Kernel panic sleep Catalina 15.4

I'm getting the crashes every time I unplug my Apple Superdrive or Samsung Blu-ray/DVD Writer from a USB port on my Late 2013 15" MacBook Pro running Mac OS 10.15.4 Catalina. I've never had this problem before that latest update.

Since the 10.15.4 update I've also had crashes/kernel panics when waking the MacBook Pro from sleep (by lifting the lid). Hopefully, to avoid the "wake from sleep" crashes, in System Preferences - Energy Saver I've unchecked "Put hard disks to sleep when possible". Also, I've checked the box for "Prevent computer from sleeping automatically when the display is off". I will check in the morning to see if this action has stopped the wake from sleep problem (it's just after 11:00 pm here).

John

Further to my last post, I can report that I've not had a kernel panic/crash since changing the Energy Saver preferences as outlined in that post. I should also mention that I have always had "Enable Power Nap" unchecked (turned off) for both Battery and Power Adapter mode - so that wasn't an issue for me, unlike what has been reported elsewhere.

Thus, the key for me was to change the Energy Saver preferences so that my MacBook Pro never goes to sleep. Previously, waking the computer from sleep triggered the crashes.

However, I'm still not sure how to fix the issue with crashes occurring when unplugging the Superdrive and/or the Samsung Blu-ray/DVD Writer. This seems to be an unrelated problem. I'm not too worried about this, as I don't use these devices on a regular basis. I should also add that if I shut down the computer while either of these are plugged in, the crash will also occur.

John

To be sure - this is a know issue with 15.4, it's a SOFTWARE issue and it's in Apple's bug tracker. Don't send your system back, simply disable Power Nap and you are fine. While 15.5 beta 1 doesn't fix it yet, I assume it may be addressed as soon as beta 2 (and then the GM).

I also have an MBP 16". I had the sleep restart issue.

After disabling "Power Nap" i did not have any crashes for three days. Seems to do the trick for me.

But i still have lots of issues with my thunderbolt Dock and Multi Monitor usage via the dock. Seems like ab AMD GFX driver issues to me.

regards

Tim

I’m curious to get your thoughts on why it might be the AMD driver (or hardware)?

Forcing the OS to use integrated only didn’t seem to improve anything for me.

that being said, I will concede there is some definite flakiness with TB3 devices.

i have another identical MBP I just received Monday. Virgin setup with only iCloud and 10.15.3 running. No KPs during sleep, but also doesn’t seem to stay asleep. Also, it did KP a few minutes after detaching it from TB3 LG 5K display.

I honestly am struggling to find a workable scenario.

Doesn't explain why brand new machine idling rattled through 50% of battery in less than an hour. Apple has big issues to resolve. They aren't as simple as turn off Power Nap. That's not doing any battery any good at all. The thing got hot whatever was hitting it. Anycase it got sent back until resolved.

I got brand new MacBook Pro 16 inch, 64GB RAM this week and the same kernel panic occurred twice.

I only installed google chrome, iterm2, with brew package manager.

I also updated OS and the filevault is turned on.

The OS is Catalina 10.15.4.

My 16" MacBook Pro i9 32MB 2TB 5500M 8 GB was running absolutely perfectly until 10.15.4. I had the KP on waking from sleep every time it was connected to a pair of LG 5K monitors. When the laptop was standalone, it worked perfectly. Tried the supplemental update, tried moving to the 10.15.5 Beta 1 and nothing fixed the problem. Eventual solution was to restore to 10.15.3 time machine backup from March 20th. So I've had a day of syncing cloud services, but no sleep or wake problems since.

I never used to understand those people who stayed on the old releases..... until now. Hope this gets fixed soon though. Pretty unacceptable that you can't use the monitors that you purchased from Apple with your MacBook.

As outlined in my previous posts here, to avoid the "wake from sleep" crashes, in System Preferences - Energy Saver I've unchecked "Put hard disks to sleep when possible". Also, I've checked the box for "Prevent computer from sleeping automatically when the display is off". Since doing this several days ago I've not had any further instances of the "wake from sleep" crashes. The "Enable Power Nap" option has always been unchecked on my system, so that hasn't been an issue for me.

Late 2013 MacBook Pro running macOS 10.15.4 Catalina (including the Supplemental Update).

John

I found this in my kernel report

loaded kexts:

com.parallels.kext.netbridge14.1.3 45485

com.parallels.kext.hypervisor14.1.3 45485

com.parallels.kext.vnic14.1.3 45485

Maybe Parallels causes problems. I don't know. after disable power nap and Prevent computer from sleeping automatically when the display is off everything is fine.

No crash. The only „strange” thing is that I can turn it on only with power button. But as long as Touch ID is there no brainer at all.

That’s why I am wondering return or not. People in other thread told me “don’t live in fear return only small percentage have problem”. If it is hardware issue I will return even tomorrow. If it is software it doesn’t matter if it is new or used machine. Bug can appear every time you install new system or update. That’s how it works. People may return their machine and tell “hey the new one works well” but still it could be related to soft. New machine means same soft but different installation process maybe without bug

Look my issue now is that I send it for repair allthough its brand new(one month) , we can't return in Israel if used.

so they replaced the mother board under warranty and its 10.15.1 , and I really don't know if upgrade or not.

what do you think about that my friend ? for now its working fine no crashes at all .

I mean probably the right thing to do is to upgrade but I really dont want to send this brand new Mac again that I jut bought !

this is a very strange situation !

maybe ill wait for the next update ? any thoughts ?>

I fully understand you but on the other hand what will you do in the future? Will you stuck with this one and only soft? I don't think so.

If you upgrade and error occurs again it will be clear info that it is soft issue. It will be good info because probably you will be able to fix it or better word hide it with some fixes. Then you will wait for update which solves this problem.

Do you use Parallels?

you right .

I upgraded last night , the issue didn't come back .

im willing to use bootcamp to install windows , if that answer your question

last time I had the issue it kinda grow from day to day .lets wait