Ugreen CSR Harmony Driver Issues with Ubuntu 18.04

When trying to use the Ugreen CSR Harmony driver on an Ubuntu 18.04 system, users may encounter issues with Bluetooth device recognition and initialization. Despite being compatible with Windows 10, this dongle fails to work properly under Linux.

Upon inserting the Bluetooth USB dongle, the kernel log displays a series of error messages, indicating that the device is not recognized by the Blueman software. The output of `hcidump` also reveals an 'Unsupported Feature or Parameter Value' error.

The problem seems to be related to the Ugreen CSR Harmony driver itself, as it does not support certain features or parameters required for proper Bluetooth functionality under Linux. This issue has been reported in conjunction with kernel versions 5.3 and Ubuntu 18.04.

To resolve this issue, users may need to apply a patch that addresses these compatibility issues. Once applied, the HCI Event log should no longer display the 'Unsupported Feature or Parameter Value' error, and Bluetooth devices should initialize properly.

For those experiencing similar issues with their Bluetooth dongle, it is recommended to investigate potential driver updates or workarounds to ensure successful connectivity under Ubuntu 18.04.

Manufacturer Information

The Ugreen CSR Harmony driver is manufactured by Cambridge Silicon Radio (CSR), a well-known company in the field of wireless communication technology. The specific device being used has an ID vendor of 0a12 and an ID product of 0001, with a firmware version of 88.91.

System Output

Below is the relevant system output when inserting the Bluetooth USB dongle:

```

Jan 26 21:10:38 some-computer kernel: usb 1-1.3: new full-speed USB device number 6 using ehci-pci

Blueman is not recognizing the Bluetooth devices.

```

The `lsusb` command reveals the device information as follows:

```

$ lsusb | grep Bluetooth

001 Device 006: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)

```

Ugreen csr harmony driver