Precision 5570 Thunderbolt not working

I am also having this exact issue.

I have a Precision 5570 with 12th-gen Intel and a Nvidia A2000. For docks I have the dual-cable USB4 dock at work and it works great, but at home I have tried both the WD19TB and WD19TBS and they both do not work.

The WD19TB would not be detected at all on any port, neither Thunderbolt 4 ports on the left or the USB-C on the right. It would make the 'device connected' sound in Windows and the LED on the cable would blink, but then the 'disconnect' sound would play and nothing was detected. The cable continued to blink and the connect/disconnected cycle repeated. I tested this in Windows 10 (corp image), Windows 11 (external bootable), and Ubuntu 22.04 (external bootable). I have a Dell G7 gaming laptop with Thunderbolt 3 and it was  detected fine as a Thunderbolt device and showed up in Thunderbolt Control Center.

I brought the WD19TB back thinking it was faulty and replaced it with a 240W WD19TBS. This also did not work on the Thunderbolt 4 ports, but it behaved differently. The light on the cable stayed solid, but I only saw the device appear for 1-2 seconds in Thunderbolt Control Center and disappear. No video, USB, network, etc.. detected. Strangely enough when I plugged it into the USB-C on the right I was able to get video to 2 monitors and all other I/O. It must have defaulted back to standard USB-C alt-mode out as this port is not Thunderbolt.

I updated firmware on both WD19TB docks and all 3 OS's were fully up to date. Both docks work fine on other TB3 devices but do not seem to be compatible with the Precision 5570. This is very unfortunate and very misleading as I can find no documentation saying this dock is incompatible.

Anyone else?

Glad to see I'm not alone, at least. I am skeptical that Thunderbolt works on these machines even with a factory Windows 11 image. For me, Windows 10 does work, but I am no longer able to use my 4K USBC monitor through the dock because it randomly falls back to 30hz. I wish I had kept my 5540 because the 5570 just acts weird in general.

I have the same issue.

We have had a similar issue where I work.

This is what we did.

1. Update to the latest BIOS verson, our case it was v1.10. once it is completed, hit F2 and load into BIOS
2. Restore Factory Defaults.
3. Change all the defaults that need to be to begin with to ensure correct operation.
4. Under intergrated Devices, scroll down and ensure Thunderbolt 'Technology Support' is turned on.
5. Apply Changes --> OK
6. Exit

Let me know if that works.

Thanks for the reply Beth.

I just double-checked my BIOS version and I am on 1.10. I did a BIOS update during my troubleshooting so that is up to date.

I restored to factory defaults and rebooted. Afterwards the "Thunderbolt Technology Support" was defaulted to on, but some of the other options were off so I turned them on. Applied changes and rebooted.

This doesn't seem to have helped, still no Thunderbolt devices detected on the Window 10 image. I will try the Windows 11 image in a little bit and see if it works in there.

Also I checked the dual-cable USB4 dock at work and it is also not connecting over Thunderbolt, only over USB-C alt-mode. I have way less peripherals/monitors on my work PC so its not much of an issue.

I suspect I also have this issue, I've tried to connect two 4K monitors with different adapters, the last one being a Thunderbolt3  Club3D adapter.

Whatever I do, I can only have 60Hz on one and 30Hz on the other. Has somebody find a solution since the last answer?

I only have one (USB-C) 4K monitor (plus two 1080P) and unless I connect the 4K monitor directly to the laptop, there is about a 90% chance it will get stuck at 30hz. If I unplug the other two 1080P monitors (which are displayport), sometimes the 4K monitor will let me select 60hz or even 120hz. But if the monitor goes to sleep or I reboot, it will go back to 30hz. None of the BIOS updates or video updates since November have changed this behavior at all.

Same exact issue here with 5570 and wd19tbs dock.. No matter what I do (tried all suggestions in this thread) the thunderbolt display will not show in the thunderbolt control software. Anyone succeeded to fix that? 

Nope, still broken for me, too. This laptop is definitely the worst precision I have owned and not just because of the thunderbolt thing.

Hello, any news on this, I have the same issue Precision 5570 + WD22TB4 everything is updated to latest, BIOS, Driver, Windows 11, and the Wd22TB4 using the Dell firmware utility.
Anyway the issue is that the WD22TB4 it is NOT recognized as a TB4 device look how it is show in the Windows 11 USB devices (and yes it is connected in the left USB-C Ports of my 5570, those are the TB4 Ports)

then I wondering where the issue is, is Windows 11, or is the way of how the TB4 it is implemented in our 5570, is the WD22TB4 not give proper info.

is Dell Support aware of this? do we think / hope they will fix it?
Thanks

The behavior today is exactly the same as it was when I created this thread. Thunderbolt mostly works in Windows 10 but it does not work at all in Windows 11. Whatever the issue is, it is unique to the 5570 and I have no faith they will fix it. I will dump this <Profanity is never allowed. DELL-Admin> as soon as I get the opportunity.

Also having issues, my device needs PCIe access to work and is being reported as a USB device instead of thunderbolt.  When I open Thunderbolt control center on Windows it shows NO devices.  I'm trying to connect to a National Instruments PXIe-8301 card and it's not showing correctly.  Looks like I need to try another laptop?