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

Of course this is not an issue with the dock. Nothing new. Already been confirmed.

I have multiple thunderbolt docks at work and all of them shows the same issue, however all of them works just fine with older Macbooks. So yeah, it's already obvious this is software related and only related to the (13") 2020 MBP...

I tried option 1 (or rather that's how I have been using the MBP2020 with CalDigit since i purchase them in Jun/Jul) and it does not work. As long as you turn off the power for your CalDigit (and naturally put your MBP to sleep), the issue will surface and requires a restart. My personal experience.

I'm really worried that this is Intel related and super hard to diagnose, and since it's happening with the last generation of Intel MacBooks, and there's rumors they're releasing Apple Silicon ones later this year, that they just deprioritized fixing this.

Follow these steps and the MBP will ALWAYS crash:

• Reboot
• Connect the LG Ultrafine Monitor 27" or 24" via the Thunderbolt 3 Apple cable
• Wake External USB Mouse works fine
• Select Sleep at the menu bar, then disconnect the Monitor
• Connect the LG Ultrafine Monitor 27" or 24"via the Thunderbolt 3 Apple cable
• Wake from sleep, the external USB Mouse stopped working
• Select Sleep at the menu bar, then disconnect the Monitor
• Wait a few seconds and the MBP will crash

also 'kextstat' command in the Terminal shows some interesting info to work with.

And free util KextViewr may be useful https://objective-see.com/products/kextviewr.html as well. It can also export results as JSON file - together with checksums as well. So it may be used for comparison as well.

Thank you. There is the difference. hhttps://www.diffchecker.com/hqhWoidB

More reasonable than the plain folder checksum, but still nothing obvious unfortunately. CTRL+F on 'thunderbolt' shows same versions of thunderbolt kexts, "AppleThunderboltEDMSink" seems to be missing on the older macOS - but that's all I could find about thunderbolt. But it may be caused by different kext of course or it may be totally different issue. I'm just thinking of kext, because those are kernel extensions and so essentially drivers for Mac HW.

That is an absolutely horrific response. I’m glad to hear Big Sur seemingly fixes this. But anything short of an admission that this is an open bug without a solution is a slap in the face to the pro consumers who are spending their time helping to fix this. Not to mention a slap in the face as general customers. By the way, I’ve seen multiple people state that this is a MacBook Pro issue and that this may be a small drop in the bucket relative to the user base, etc. It appears that this is across all 2020 macs. My MacBook Air has this problem. iMacs are just less likely to be hot swapping.

I think I’m going to have to put in a call to Apple support. This, on top of the dire thermal constraints of my laptop, are really making me want to return this thing. I will happily buy an Apple Silicon machine.

Same problem here. 2020 MacBook Pro 13" (10th Generation Intel CPUs) running MacOS 10.15.7. I am using a Plugable TBT3-UDV Thunderbolt dock. I can reproduce the problem 100% of the time. Just unplug Thunderbolt cable from Mac, close the Macbook lid for 30 seconds (enough for a light sleep), open the lid, and re-plug Thunderbolt cable. None of the USB devices are recognized, and the Ethernet port is also not recognized. The two displays work perfectly, however. Rebooting the Mac restores USB and Ethernet connectivity. Alternatively, if I try to unplug and re-plug the Thunderbolt cable without performing a restart, the Mac crashes hard with the same error reported above: "Intel CrashLog recorded due to unexpected reset". I have a ticket open with Apple Support.

My new 2020 MBP does exactly the same with my Apple Thunderbolt display, all of the issues you mention:

1. The Apple monitors built in hub doesn't work unless you reboot the MBP..... so I have to do this every time I come out of sleep.
2. If I unplug the monitor and plug it back in again it often crashes and reports "Intel CrashLog recorded due to unexpected reset"

My old mid 2014 MBP doesn't have any of these issues.

I am using all Apple products, so thats an MBP, Apple Thunderbolt display, and Apple Thunderbolt 3 to 2 adaptor.... No third party equipment involved at all.

I'm on Big Sur and still having issues. Basically I start my day by rebooting and unplugging my dock to get my $2000 laptop to work....

I tend to disconnect at the end of the day and use my laptop without a dock then the following day I will connect to the dock. Most of the time it does not work. No kernel panics it just does not work until I reboot

I updated to Big Sur hoping it would resolve the issues, as it apparently did for you.

Unfortunately the problem persists on Big Sur! My first impression is that it even got worse - today the MBP when re-opening after disconnecting from the TB3 monitor (LG Ultrafine 5k in my case) started wildly flickering showing occasional horizontal stripes of the desktop alternating with fully black screen. I had to reboot.

Thank you, I means maybe you can just disconnect the cable directly between the docking station and Mac (but if you have some portable disk connect to the docking station, eject the disk first)and connect them with the port on the other side of your Mac when you wake it up. Just have a try, good luck!

Steps to reproduce:

1. Boot (cold or warm, connect to TB3 Dock before or after booting- all variations apply)
2. Put MacBook to sleep (software- Apple logo -> Sleep)
3. Wait 1 minute
4. Disconnect MacBook from dock
5. Wait 5 minutes
6. Connect MacBook to dock, which will wake it from sleep
   1. At this point System Report shows none of the connected Dock (USB and other) devices- for examples see SPUSBDataType and SPAudioDataType datatypes.
7. Wait 1 minute
8. Disconnect MacBook from dock
9. Wait 5 minutes
10. Connect MacBook to dock

Notes:

1. MacBook sometimes crashes after step #8 (last disconnection), sometimes after #10 (last connection), occasionally crashes after 2-3 iterations (i.e. more than one sleep-disconnect-wake cycle).
2. The 5-minute wait phases can typically be shorter.

(split to 2 posts due to the annoying "You’ve exceeded the 5000 character limit for this post" error - even though total's < 3,000 chars)

It is abundandtly clear that you (and many others here) are right and that this is an Apple driver issue.

However, it does not seem Apple is doing anything to address the situation, or at least not enough.

For me, the observable symptoms have shifted a tiny bit with Big Sur, but essentially the problem remains - it is not possible to disconnect and reconnect my TB monitor (LG Ultrafine 5k) without a crash or at least external USB failure.

As a developer with access to their feedback assistant bugtracker (formerly "Radar") I filed this issue already back in October - but it is sitting there with no response with status "Resolution: open, Similar Reports: none" ever since.

What needs to happen that Apple officially takes notice and does something??

Something I haven't seen mentioned here:

Since I've been docking my MBP2020, which has been since I bought it (because lockdowns), I've experienced slowdowns from time to time. Today, I've had it slow multiple times. So instead of restarting the machine, which I normally do (foolishly believing that the slowdowns are caused by some program or tool that isn't completely optimized), I unplugged the dock and quickly plugged it back in before the machine could go to the Lock Screen. Funnily enough, it fixed the slowdown and just jittered its way through refreshing the multiple desktops.

I still suffer from severely laggy bluetooth response to my MXMaster3 either way, but the sluggishness and the slowdowns.... do they happen to anyone else?