You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

User profile for user: broko_fankone
broko_fankone Author
User level: Level 1
60 points

MBP 13 2020 won't recognize USB devices from TB dock after sleeping and connecting to the dock. After unplugging the dock MBP crashes and does SMC reset

Device: MBP 13" 2020 10th gen i5

Catalina 10.15.6

Dock: CalDigit TS3+ with firmware 44.1


I'm not sure if this problem is exclusive to Catalina 10.15.6, but I can't say since my dock arrived after the latest update got shipped and I haven't tried if it works on 10.15.5.


Basically, I unplug the dock at night and put the MBP to sleep. After a few hours of sleep it seems to stop recognizing the USB devices plugged into the dock. The dock has a USB audio interface, a logitech wireless dongle (for G604 mouse), a DP monitor and the power supply for the dock. When I plug it after the mac has been in sleep for hours, the mac won't recognize the audio card and the mouse (just the USB issue we had in previous catalina versions with all kinds of USB hubs and USB devices), but the monitor works and everything has power supplied to it, including the USB devices.

If I then unplug the dock and replug it, often the mac straight-up crashes completely and shuts down, powering on with an error that it recovered from a problem ( it also does an SMC reset).


The error report later states: "Intel CrashLog recorded due to unexpected reset".


This reddit thread speaks of the exact same issue with a different monitor and some people with different docks:

https://www.reddit.com/r/macbookpro/comments/i0m9si


Basically, what I'm saying is that the original USB issue is not fixed yet and now it's much worse because:

  1. You can't fix the USB problem unless you restart the mac - re-plugging the devices into the dock won't solve it
  2. The macbook directly crashes and does an SMC reset if you unplug/replug the dock, wiping your unsaved data and crashing anything else you might have open at the time


Additional problem: Monitor sometimes doesn't wake up at all after mac is awoken from sleep. At one point the monitor went to sleep WHILE I was using the mac actively.


I have tried NVRAM/SMC resets and they did nothing.


I wrote an email to CalDigit and they confirmed a lot of other users have complained about this:


"Our engineers have been investigating into the brand new 2020 MacBooks as we’ve had detailed reports from several of our customers who have tried many different brands of docks, from OWC, Kensington, Elgato and ours and none of them have been able to function correctly via the latest chipsets in these Macs."


PLEASE FIX the usb/dock/monitor issues already! This is a problem of Apple devices exclusively. This is unacceptable for a laptop at this price from the year 2020. Cheap off-brand laptops do not have such issues with peripherals!!

MacBook Pro 13″, macOS 10.15

Posted on Aug 4, 2020 11:01 AM

Reply
Question marked as Top-ranking reply
User profile for user: erang27
erang27
User level: Level 1
4 points

Posted on Dec 7, 2020 12:06 PM

I've been having this issue w/ my 13" 2020 MBP since I started using it a couple of months ago, with different dock models.



TL;DR


  • Issue reproduced on 2 different 13" 2020 MBPs running 10.15.7, one running a clean macOS install (no additional software installed), w/ 2 different TB docks.
  • 13" 2018 MBP works fine in all of the (same) tested configurations.




Details:


Since I have the benefit of having multiple MBPs and docks to test with, I'm (not that folks here require convincing) incredibly confident this issue isn't due to some people having faulty hardware (e.g. logic board, dock, whatever).


  • I was easily able to reproduce the kernel panic ("Intel CrashLog recorded due to unexpected reset") on a freshly installed 13” 2020 MBP (clean macOS installation- zero software installed).
  • This is consistently reproduced w/ 2 different 10.15.7 builds ((19H2 and 19H15 - didn't bother to test 19H4 and/or 10.15.6).
  • 10.15.5 (19F2200) works fine.
  • 11.0.1 (20B50 - didn't test 20B29) works fine.


I tested 2 different setups:


  • OWC TB3 dock, with 2 devices connected to it- Dell U2719DC monitor (DisplayPort) and Logitech K120 USB keyboard:


                     +---------+
                     |   MBP   |
                     +----+----+
                          |
                          |
                         TB3
                          |
                          v
                   +------+-------+
                   | OWC TB3 dock |
                   +----+-----+---+
                       |     |
                      USB    DP
+---------------+      |     |      +--------------+
| Logitech K120 +------+     +------+ Dell U2719DC |
+---------------+                   +--------------+




                     +---------+
                     |   MBP   |
                     +----+----+
                          |
                          |
                 Apple TB3/TB2 adapter
                          |
                          v
                 +--------+---------+
                 | Apple TB Display |
                 +------------------+


View in context

Similar questions

344 replies
User profile for user: Thinking_Different
Thinking_Different
User level: Level 1
9 points

Sep 30, 2020 7:25 AM in response to broko_fankone

I've also been experiencing this issue. Mostly after the 10.15.7 update, however, it seems others have had the problem for months.

Unplugging the dock causes a kernel panic, trying to use it causes a kernel panic, restarting causes a kernel panic, nothing works.


I also am using an eGPU for my external monitor. I noticed that when this happens, the eGPU isn't used. It's as though all of the Thunderbolt ports shut down.


I hope this is a firmware issue, but I fear it may be a hardware problem.

2020 MacBook Pro, 13", Intel Core i7 with 4 Thunderbolt ports.

Reply
User profile for user: logicito
logicito
User level: Level 1
52 points

Oct 8, 2020 3:24 PM in response to Shctorm

I've tried almost everything and there is no solution, it is definitely something with the Thunderbolt 3 interface, I planned to go to the Apple store but they no longer have on display any of the LG Ultrafine displays, 4K or 5K, that means I will have to bring my monitor with me as well to show them the issue, too complicated, I hope Apple is doing something with the Kernel Crash logs I am sending them every time the laptop crashes, 5-10/day, at least, this is a shame.

Reply
User profile for user: Hacky_4
Hacky_4
User level: Level 1
4 points

Oct 9, 2020 6:40 AM in response to logicito

@logicito: could you please check for kext difference between versions?


I'm not sure whether kexts are always recompiled even between minor versions of MacOS, but if they are not - maybe we can pinpoint the kext responsible for Thunderbolt and inject the 10.15.5 Thunderbolt kext to our newer 10.15.7 MacOS and it may potentially fix the issue for us. Naturally I'm not sure whether the kext would be compatible with 10.15.7 MacOS (kernel), but there is a chance.

Reply

MBP 13 2020 won't recognize USB devices from TB dock after sleeping and connecting to the dock. After unplugging the dock MBP crashes and does SMC reset

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.
Learn more Sign up