Ubuntu安裝RTL8761B驅動
# 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.bin
sudo modprobe btusb
sudo systemctl start bluetooth.service
hciconfig -a # will show that Bluetooth is up now