Why it happens
Outdated Thunderbolt or USB4 controller driver on the Latitude 7450
Docking station firmware not updated to match the laptop platform generation
Thunderbolt access policy set to require approval before connecting new devices
USB-C cable not supporting full Thunderbolt 4 bandwidth — passive cables limit to USB 3.2 speeds
How to fix
Update the Thunderbolt controller driver — Download the latest Intel Thunderbolt Controller driver from Dell Support for the Latitude 7450. Install it and restart. This is the most common fix for docks that were previously detected but stopped working after a Windows or BIOS update.
Update the docking station firmware — Connect the Dell WD dock or TB dock directly to the laptop. Open Dell Docking Station Firmware Update Utility (downloadable from Dell Support) and apply any available firmware update. Outdated dock firmware is a frequent cause of detection failures with newer laptop platforms.
Set Thunderbolt security level to No Security — Restart and press F2 to enter BIOS. Navigate to Security → Intel Thunderbolt and set the security level to No Security or User Authorization. If set to SL3, the dock must be explicitly approved each session.
Use a certified Thunderbolt 4 cable — Replace the USB-C cable with a Thunderbolt 4 certified cable (marked with the TB4 lightning bolt logo). Passive USB-C cables limit bandwidth to USB 3.2 speeds and cannot negotiate the full dock device tree over Thunderbolt.
Update the BIOS — Install the latest BIOS from Dell Support for the Latitude 7450. Dell BIOS updates for this model include Thunderbolt compatibility improvements for WD22/WD25 series docks. Run the update with the dock disconnected to avoid interruption.
Zulkifli, Putrajaya: “My Dell WD22TB4 dock stopped being detected after a Windows update. Updating the Thunderbolt driver from Dell Support and applying the latest dock firmware fixed it within 15 minutes.”
Frequently Asked Questions
Which docking stations are compatible with the Dell Latitude 7450?
The Latitude 7450 is compatible with Dell Thunderbolt Dock WD22TB4, Dell Performance Dock WD19DCS, and other Thunderbolt 4 and USB4 docks. Dell WD series docks with USB-C (non-Thunderbolt) also work at USB 3.2 speeds.
Why does the dock work on one USB-C port but not the other?
The Latitude 7450 has two Thunderbolt 4 ports, but only specific ports deliver full Thunderbolt bandwidth for docking. Refer to the Dell Latitude 7450 user manual to identify which port is the primary dock port.
Can the docking station firmware be updated without a laptop connection?
No. The Dell Docking Station Firmware Update Utility requires the dock to be connected to a compatible laptop. Run the utility while the dock is attached via Thunderbolt to ensure the firmware is applied correctly.
Does the Latitude 7450 support Power Delivery through the dock?
Yes. Compatible Dell docks can power and charge the Latitude 7450 through the Thunderbolt 4 connection, eliminating the need for a separate power adapter as long as the dock provides at least 90 W of USB-C power delivery.
Ryan holds a Computer Science degree and has over 20 years of hands-on experience with PC hardware, software, and driver troubleshooting. He is the author behind softwaredriverdownload.com, where he helps everyday users fix driver issues quickly and accurately. Ryan has personally tested most of the fixes on this site across a range of Windows 10 and Windows 11 machines.
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