Before installing any new software, complete these preparatory steps to prevent driver conflicts:

The Ugreen CM390 utilizes the chipset. Modern Linux kernels (version 5.8 and newer) include native support, but you may need to manually deploy the firmware file if it is missing. Open your terminal. Check if the system recognizes the USB device by running: lsusb Use code with caution. Look for a line mentioning "Realtek" or "Bluetooth Radio". Check your kernel ring buffer for missing firmware errors: dmesg | grep -i bluetooth Use code with caution.

If you are encountering any specific errors during the setup process, tell me you are running or the exact error code you see in Device Manager so I can provide a targeted fix. Share public link