Bluetooth Realtek 8761B does not work on 20.04.1 LTS, kernel 5.9.8-050908-generic,

[thang-tt2711]

my laptop uses 20.04.1 LTS, just bought usb bluetooth adapter Realtek 8761b (actually https://www.orico.cc/us/download.html?skeyword=BTA-508, it does not have linux driver, I download and see in the release notes the chip set is Realtek 8761B, Bluetooth 5.x)

I read this link https://ubuntuforums.org/showthread.php?t=2448259&page=2&


then I installed Ubuntu Mainline Kernel Installer from https://github.com/bkw777/mainline, version 1.0.12 and upgrade my kernel to stable version, now it is


uname -sr

Linux 5.9.8-050908-generic



Then downloaded the package from MPOW:
https://mpow.s3-us-west-1.amazonaws....+for+Linux.tgz (https://mpow.s3-us-west-1.amazonaws.com/mpow_MPBH456AB_driver+for+Linux.tgz)
Unpacked, copied and renamed the rtl8761b_fw and rtl8761b_config files inside /lib/firmware/rtl_bt, adding the ".bin" extension.



/lib/firmware/rtl_bt$ ll

….

-rw-r--r-- 1 root root 25 Thg 11 13 18:13 rtl8761b_config.bin

-rw-r--r-- 1 root root 25 Thg 11 13 18:13 rtl8761b_fw.bin



I reboot my system, plug my realtek adapter in and checked



run this command lsusb



output



Bus 001 Device 002: ID 8087:8000 Intel Corp.

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 002 Device 003: ID 1bcf:2985 Sunplus Innovation Technology Inc. Laptop Integrated Webcam HD

Bus 002 Device 002: ID 0bda:8771 Realtek Semiconductor Corp. Bluetooth Radio

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub



run this command

sudo dmesg |egrep -i bluetooth



output

[ 1.174836] usb 2-2: Product: Bluetooth Radio

[ 3.688392] Bluetooth: Core ver 2.22

[ 3.688411] Bluetooth: HCI device and connection manager initialized

[ 3.688415] Bluetooth: HCI socket layer initialized

[ 3.688416] Bluetooth: L2CAP socket layer initialized

[ 3.688419] Bluetooth: SCO socket layer initialized

[ 3.753789] Bluetooth: hci0: RTL: examining hci_ver=0a hci_rev=000b lmp_ver=0a lmp_subver=8761

[ 3.754356] Bluetooth: hci0: RTL: rom_version status=0 version=1

[ 3.754358] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761b_fw.bin

[ 3.754659] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761b_config.bin

[ 3.754818] Bluetooth: hci0: RTL: extension section signature mismatch

[ 5.781570] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 5.781573] Bluetooth: BNEP filters: protocol multicast
[ 5.781577] Bluetooth: BNEP socket layer initialized
[ 1893.127743] Bluetooth: hci0: RTL: examining hci_ver=0a hci_rev=000b lmp_ver=0a lmp_subver=8761
[ 1893.128673] Bluetooth: hci0: RTL: rom_version status=0 version=1
[ 1893.128675] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761b_fw.bin

[ 1893.128679] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761b_config.bin

[ 1893.128682] Bluetooth: hci0: RTL: extension section signature mismatch
[11189.657493] Bluetooth: hci0: RTL: examining hci_ver=0a hci_rev=000b lmp_ver=0a lmp_subver=8761
[11189.658483] Bluetooth: hci0: RTL: rom_version status=0 version=1

[11189.658485] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761b_fw.bin

[11189.658520] Bluetooth: hci0: RTL: loading rtl_bt/rtl8761b_config.bin

[11189.658537] Bluetooth: hci0: RTL: extension section signature mismatch


run this command
sudo blueman-manager


output


blueman-manager version 2.1.2 starting

blueman-manager 17.09.35 ERROR Manager:118 on_dbus_name_appeared: Default adapter not found, trying first available.
blueman-manager 17.09.35 ERROR Manager:122 on_dbus_name_appeared: No adapter(s) found, exiting


so there is no bluetooth adapter, when I go to Settings, click on Bluetooth, click on the button to toggle Bluetooth to ON, nothing happens, if I clicked to OFF, there is bluetooth icon displayed in the top right corner of the screen with a red dot mean something error, click on that bluetooth icon, I see a pulldown menu with grey-out options: Set Up New Device, Send Files To Device, Recent Connections, Devices, Adapters

other options are select-able : Turn Bluetooth On, Local Services, Plugin, Exit



please help me to identify why bluetooth adapter does not work, thanks

[geekor]

Hi, it works for me using your driver (https://mpow.s3-us-west-1.amazonaws.com/mpow_MPBH456AB_driver+for+Linux.tgz). Just run follow:


cd 20200610_LINUX_BT_DRIVER/
sudo make install INTERFACE=all


Ubuntu 20.04.1 LTS, 5.4.0-56-generic. ORICO BTA-508 (RTL8761B)

(Replug your bt adapter after installing the driver :P )

[Vladimir2k9]

When attempt download file https://mpow.s3-us-west-1.amazonaws.com/mpow_MPBH456AB_driver+for+Linux.tgz got error forbidden 403
Can someone upload and give link.

[dcagatay]

I found an updated version of the driver (I think) at the following link: https://mpow.s3-us-west-1.amazonaws.com/20201202_mpow_BH456A_driver+for+Linux.7z

I did exactly what geekor said in his post (https://ubuntuforums.org/showthread.php?t=2453631&p=14006235#post14006235) and the dongle started working.

Reference: https://gist.github.com/rometsch/dfd24fb09c85c1ad2f25223dc1481aaa#gistcomment-3709943

[fabio.vix]

Hi!

I've tested the updated version dcagatay posted.. and it has worked here (Ubuntu Unity 20.04, kernel 5.8.0-48).
It's a Orico BTA-508 Bluetooth dongle.

All i've done is unzip the file, entered on the "20201202_LINUX_BT_DRIVER" folder and the used the cmd:

sudo make install INTERFACE=all

An important note: I realized that if there's any space on the path to the folder, the MAKE will fail while compiling the driver. So, make sure that the path to the folder has no space on the names.

By the way, I was wondering why the mic from my Motorola Escape 220 BT headphone wasn't working after i've paired it sucessfuly with de dongle, and i've found it:

https://askubuntu.com/questions/354383/headphones-microphone-is-not-working

[nasim.ansari]

rtl8761b firmware is not shipped with Linux distribution if you see error below errors:


Direct firmware load for rtl_bt/rtl8761b_fw.bin failed with error -2
firmware file rtl_bt/rtl8761b_fw.bin not found


Execute below commands to install firmware.

cd /tmp
# Download rtl8761b_config and rtl8761b_fw from https://github.com/Realtek-OpenSource/android_hardware_realtek
wget https://raw.githubusercontent.com/Realtek-OpenSource/android_hardware_realtek/rtk1395/bt/rtkbt/Firmware/BT/rtl8761b_config
wget https://raw.githubusercontent.com/Realtek-OpenSource/android_hardware_realtek/rtk1395/bt/rtkbt/Firmware/BT/rtl8761b_fw
mv rtl8761b_config /lib/firmware/rtl_bt/rtl8761b_config.bin
mv rtl8761b_fw /lib/firmware/rtl_bt/rtl8761b_fw
sudo modprobe btusb
sudo systemctl start bluetooth.service
hciconfig -a # will show that Bluetooth is up now