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

Interesting, Apple has removed all posts from this thread that mentioned I was able to get a refund for my 2020 four-port MBP (after going through tons of troubleshooting and sending it in for logic board replacement). I have an M1 MBP now, and was still having some TB issues (no kernel panics) until updating to 11.1. Now it's all working fine. I'd be curious if 11.1 fixes the issues on Intel MBPs.

Hello,

What specific MacBook configuration or Dock is that?

Can you also give us the details of the Thunderbolt and Type-C ports on the device?

I found this article and it seems like Apple has not been able to solve the problem.

[26 February 2021

macOS 11.2.2 Protects MacBook Pro and MacBook Air from Non-Compliant USB-C Hubs and Docks

https://tidbits.com/2021/02/26/macos-11-2-2-protects-macbook-pro-and-macbook-air-from-non-compliant-usb-c-hubs-and-docs/

Same here with Dell WD19TB dock on macOS 10.15.7 (19H1217)

I got two monitors:

• A: one from USBC/DisplayPort
• B: one from USB-C==>HDMI.

Problem 1:

When hot plug, only A is recognised. I have to plug out both and replug in B first, wait for it, then plugin A.

Problem 2:

Sometimes, only A monitor is recognised , the rest of ports ( USB hub, ethernet, etc) are missing.

Problem 3:

Frequent crashlog recorded due to unexpected reset message. Usually once a week...

Apple, do something...

Let us know if turning off monitor sleep helps. I have not tried that. I ended up disconnecting my thunderbolt 3 dock completely and have not crashed since. I'd sure like to use that dock again. It saves me a lot of trouble in terms of cabling and power management etc.

Hello

I have the same issue with and without using a dock: mbp 13-inch 2020 OS 10.15.7

Sent MacBook to sleep after ejecting and disconnecting external volumes. Next morning volumes are not recognised when reconnected. Only thing that helps to have them recognised is to restart the MacBook which causes kernel panic.

I have this probably for about a year now. First blamed it on my USB to TB hub and antique external HDD that I used for time machine. Half a year ago I replaced that setup with obscenely expensive OWCENVPROTB3 which connects directly via TB3. The issue persists.

Same problems, 2020 Macbook Air with a Dell thunderbolt dock. It was definitely introduced in 10.15.6.

Agreed. Chipset driver issue to be precise. I feel we've already done good troubleshooting for apple, narrowed down the problem, and yet still no response from them.

Yes, the latest beta.

I think it is related to the TB3 implementation in the last MacBook Pro 2020, I am doing some testing with USB-C monitors vs TB3 monitors

Same - 2020 MBP 13" i5 running 10.15.7, connecting via Apple TB/USB-C adapter to an Apple Thunderbolt Display, full reboot roughly every other time I disconnect the monitor.

Similar problems using a Belkin Thunderbolt hub bought from Apple 😠

Does the macOS Catalina Supplemental Update (19H15) released today FIXED the issue with the crashes?

It did not for me. Not until the latest update....

I also experience this issue with my 2020 MacBook Pro—13-inch, 2020, Four Thunderbolt 3 ports—when connecting to my Apple Thunderbolt Display—very, very frustrating, with seemingly no viable solution.

While I understand that some have had success upgrading to Big Sur; others report the same issue following the update, so I'm not absolutely convinced.

For me:

• I'm using MacOS Catalina 10.15.7 (19H524);
• I'm connecting the display via a Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter.

What appears to be working with some success—though I don't yet have a sizeable data sample to confirm—is switching off/sleeping the monitor prior to disconnection of the dock. This is achieved via pressing control + shift + eject.

I understand that it's also possible via the command line:

pmset displaysleepnow

My understanding is that this might also disable the display's dock—and thus, might make the display/dock disconnection a little safer—but I'm going to keep working on the theory by trialling it.

Also experiencing these very issues with my new 2020 MBP 13. I have my work network cable plugged in to a Caldigit TB mini-dock along with 2 hdmi cables - the monitors usually come back fine (sometimes the screens are out of order), but ethernet and the 2 USBs don't work until I restart. Similarly when using 2 HDMI -> TB cables at home, after waking the laptop from sleep one of the screens will sometimes fail to turn on until i unplug and plug in the cable again. Is it possible this issue was introduced in the most recent update, as I don't recall having this problem when I first received and setup the laptop.