Missing bluetooth driver for RTL8761

[Armate]

The Armbian 22.11.4 Jammy with Linux 6.0.10-rockchip64 doesn't have the drivers for a USB Bluetooth bought from Amazon.

 

The kernel gives me these errors at boot:

 

Quote

feb 10 14:29:24 RockPi kernel: usb 3-1: new full-speed USB device number 2 using ohci-platform
feb 10 14:29:24 RockPi kernel: usb 3-1: New USB device found, idVendor=0bda, idProduct=8771, bcdDevice= 2.00
feb 10 14:29:24 RockPi kernel: usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
feb 10 14:29:24 RockPi kernel: usb 3-1: Product: Bluetooth Radio
feb 10 14:29:24 RockPi kernel: usb 3-1: Manufacturer: Realtek
feb 10 14:29:24 RockPi kernel: usb 3-1: SerialNumber: 00E04C239987
[ 1362.077700] Bluetooth: hci0: RTL: firmware file rtl_bt/rtl8761bu_fw.bin not found
feb 10 14:29:25 RockPi kernel: Bluetooth: Core ver 2.22
feb 10 14:29:25 RockPi kernel: NET: Registered PF_BLUETOOTH protocol family
feb 10 14:29:25 RockPi kernel: Bluetooth: HCI device and connection manager initialized
feb 10 14:29:25 RockPi kernel: Bluetooth: HCI socket layer initialized
feb 10 14:29:25 RockPi kernel: Bluetooth: L2CAP socket layer initialized
feb 10 14:29:25 RockPi kernel: Bluetooth: SCO socket layer initialized
feb 10 14:29:25 RockPi kernel: usbcore: registered new interface driver btusb
feb 10 14:29:25 RockPi kernel: Bluetooth: hci0: RTL: examining hci_ver=0a hci_rev=000b lmp_ver=0a lmp_subver=8761
feb 10 14:29:25 RockPi kernel: Bluetooth: hci0: RTL: rom_version status=0 version=1
feb 10 14:29:25 RockPi kernel: Bluetooth: hci0: RTL: loading rtl_bt/rtl8761bu_fw.bin
feb 10 14:29:25 RockPi kernel: bluetooth hci0: Direct firmware load for rtl_bt/rtl8761bu_fw.bin failed with error -2
feb 10 14:29:25 RockPi kernel: Bluetooth: hci0: RTL: firmware file rtl_bt/rtl8761bu_fw.bin not found

 

Listing the available bluetooth drivers

 

ls -l /usr/lib/firmware/rtl_bt

 

gives me:

 

Quote

-rw-rw-r--  1 root root    68 ian 23 22:50 rtl8723b_config.bin
-rw-rw-r--  1 root root 46236 ian 23 22:50 rtl8723b_fw.bin
lrwxrwxrwx  1 root root    19 ian 23 22:50 rtl8723bs_config.bin -> rtl8723b_config.bin
-rw-rw-r--  1 root root    68 ian 23 22:50 rtl8723bs_config-pine64.bin
lrwxrwxrwx  1 root root    15 ian 23 22:50 rtl8723bs_fw.bin -> rtl8723b_fw.bin
lrwxrwxrwx  1 root root    28 ian 23 22:50 rtl8723cs_cg_config.bin -> ../rtlbt/rtl8723cs_cg_config
lrwxrwxrwx  1 root root    24 ian 23 22:50 rtl8723cs_cg_fw.bin -> ../rtlbt/rtl8723cs_cg_fw
lrwxrwxrwx  1 root root    28 ian 23 22:50 rtl8723cs_vf_config.bin -> ../rtlbt/rtl8723cs_vf_config
lrwxrwxrwx  1 root root    24 ian 23 22:50 rtl8723cs_vf_fw.bin -> ../rtlbt/rtl8723cs_vf_fw
lrwxrwxrwx  1 root root    28 ian 23 22:50 rtl8723cs_xx_config.bin -> ../rtlbt/rtl8723cs_xx_config
lrwxrwxrwx  1 root root    24 ian 23 22:50 rtl8723cs_xx_fw.bin -> ../rtlbt/rtl8723cs_xx_fw
-rw-rw-r--  1 root root    47 ian 23 22:50 rtl8723ds_config.bin
-rw-rw-r--  1 root root 48988 ian 23 22:50 rtl8723ds_fw.bin
-rw-rw-r--  1 root root    10 ian 23 22:50 rtl8821c_config.bin
-rw-rw-r--  1 root root 37356 ian 23 22:50 rtl8821c_fw.bin
-rw-rw-r--  1 root root    14 ian 23 22:50 rtl8822b_config.bin
-rw-rw-r--  1 root root 51176 ian 23 22:50 rtl8822b_fw.bin
-rw-rw-r--  1 root root    73 ian 23 22:50 rtl8822cs_config.bin
-rw-rw-r--  1 root root 66248 ian 23 22:50 rtl8822cs_fw.bin
-rw-rw-r--  1 root root    55 ian 23 22:50 rtlbt_config
-rw-rw-r--  1 root root 44504 ian 23 22:50 rtlbt_fw
-rw-rw-r--  1 root root 51364 ian 23 22:50 rtlbt_fw_new

 

while the latest Linux kernel contains the driver:

 

https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/rtl_bt

 

Where can I get it or how can I install the bluetooth driver?

[SteeMan]

Have you tried installing armbian-firmware-full?

[Armate]

After installing armbian-firmware-full, the bluetooth firmware gets loaded.

Thank you!