Ugreen Bluetooth 5.0 Usb Adapter Cm390 Driver -

Even with the correct driver, users face common issues. Here is how to solve them.

The Realtek RTL8761B chipset often requires firmware files that are not included in the kernel by default. You may need to manually download rtl8761b_fw and rtl8761b_config. We will cover this in Part 5.

Yes, it works. The Pi OS includes the Realtek driver. Plug and play. ugreen bluetooth 5.0 usb adapter cm390 driver

A common myth is that Windows 11 "just works" with all Bluetooth 5.0 adapters. While the CM390 will pair devices using the Microsoft driver, you lose the following without the official UGREEN/Realtek driver:

Benchmark result: In third-party tests, the UGREEN CM390 with the Realtek driver achieved 1.8 Mbps file transfer speed, while the Microsoft driver capped at 800 Kbps. Even with the correct driver, users face common issues

Under the hood, the CM390 utilizes the Realtek RTL8761B chipset. While branded as UGREEN, the drivers are essentially Realtek drivers packaged by UGREEN.

For Arch Linux: Use the rtl8761b-firmware package from AUR. A common myth is that Windows 11 "just

Note: Some Linux distributions (Fedora 38+) include this firmware by default. Try a live USB first.