UGREEN CM478 not recognized on Windows 11 – DisplayLink driver installed, no output

[Lucas Ferreira]

Hi,

I'm having trouble with a UGREEN CM478 USB-C to HDMI adapter that uses DisplayLink technology. The device works perfectly on another laptop running Ubuntu, so it's not a hardware defect.

On my Windows 11 machine, I’ve tried the following:

Installed the latest DisplayLink driver from displaylink.com

Ran the DisplayLink Cleaner Tool and reinstalled the driver as Administrator

Disabled Fast Startup in Windows

Verified Windows is not in S Mode

Updated Intel and NVIDIA GPU drivers

Tried creating a new user account

Used different USB-C ports

However, the adapter is not recognized at all:

It doesn't show up in Device Manager

The DisplayLinkManager service is missing in services.msc

The DisplayLink Support Tool reports:

Driver is not installed.

No external monitor is detected in Windows display settings

Logs collected via DisplayLink Support Tool are available, if needed.

Could this be a known issue with this adapter and Windows 11? Or is there any additional step required to activate the DisplayLink driver?

Thank you in advance for your help.