We are using several "Dell Pro Thunderbolt 4 Smart Dock – SD25TB4". We like the numerous ports and the 2.5 Gbit network connection.

But we have problems if we use them with laptops which have only Thunderbolt 3 and no Thunderbolt 4. Then USB and network works fine, but the monitors don´t show anything.

We have the problems with Latitude 7480 and Latitude 5591. The BIOS and driver of the laptops and the firmware of the docking station are the latest versions.