Dell Thunderbolt WD22TB4 Docks May Have USB Ports Fail When a Powered Device is Connected

When a powered device (such as a powered speaker) is plugged in to a Dell Thunderbolt WD22TB4, the USB ports may stop working.

Affected Devices:

• Dell Thunderbolt Dock - WD22TB4

This is not due to a Dell hardware failure. Several security software suites can block Thunderbolt 4 (TB4) functionality.

Check if releasing the flea power allows powered devices to work. If not, try temporarily disabling the security software. For more information, reference the steps below.

Release Flea Power on the Dell Thunderbolt Dock - WD22TB4

1. Remove the dock USB Type-C or Thunderbolt cable from the computer.
2. Unplug AC power from the dock.
3. Drain any remaining power to the dock by holding the power button for 30 seconds.
4. Plug AC power into the dock.
5. The dock LED on the power button should blink three times.
6. Plug the dock’s USB Type-C or Thunderbolt cable back into the computer.

Temporarily Disable Security Software

Test to find out if an installed security suite software is causing the issue by temporarily disabling your security suite software. If temporarily disabling your security suite software results in the USB ports working again, the security software suite is blocking the dock’s TB4 functionality.

Some software security suites may allow the dock to be allowlisted. If allowlisting the dock in your software security suite is not an option, contact your software security suite vendor for further troubleshooting options.