Hi, I had the same issue with a different USB-C monitor and same laptop. I had to Enable the following setting in the BIOS: Under Integrated Devices - Video/Power only on Type-C PortsFeels weird to have to limit the port for it to work but that solved my issue.
Hi I' have problem with USB-C connection (Display Port + Power Delivery) of Latitude 5531 to a NEC EA271U monitor. The Windows displays message that the USB device is not recognized. There's no video signal on the monitor, the laptop is not powered with the usb-c cable. When I connect my old Latitude 5591 everything works fine, so I assume that the monitor and the usb-c cable are OK. All drivers, bios etc. on the 5531 are up to date, there is no error displayed on device manager.The Dell support have replaced a motherboard in the 5531 and nothing changed, so it seems like there's no hardware problem on the laptop. Does anybody have an idea what could be the problem? ThanksHrbzet
Latitude 5531 to NEC monitor usb-c connection problem