Bluetooth doesn't work with Ubuntu 18.04 [BCM20702A1-13d3-3411]

Question

I installed Ubuntu 18.04 in my Alienware 17, everything is running fine except the Bluetooth. It's active but I can't connect with my headphones, telephone and mouse.

sudo dmesg | grep -i bluetooth

[    4.733843] Bluetooth: Core ver 2.22
[    4.733970] Bluetooth: HCI device and connection manager initialized
[    4.733973] Bluetooth: HCI socket layer initialized
[    4.733975] Bluetooth: L2CAP socket layer initialized
[    4.733979] Bluetooth: SCO socket layer initialized
[    4.941900] Bluetooth: hci0: BCM: chip id 63
[    4.942900] Bluetooth: hci0: BCM: features 0x07
[    4.958903] Bluetooth: hci0: kacub18pc
[    4.959898] Bluetooth: hci0: BCM20702A1 (001.002.014) build 0000
[    4.960174] bluetooth hci0: Direct firmware load for brcm/BCM20702A1-13d3-3411.hcd failed with error -2
[    4.960176] Bluetooth: hci0: BCM: Patch brcm/BCM20702A1-13d3-3411.hcd not found
[    6.157166] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    6.157167] Bluetooth: BNEP filters: protocol multicast
[    6.157171] Bluetooth: BNEP socket layer initialized
[   30.844116] Bluetooth: RFCOMM TTY layer initialized
[   30.844120] Bluetooth: RFCOMM socket layer initialized
[   30.844125] Bluetooth: RFCOMM ver 1.11
[   75.236262] Bluetooth: hci0: last event is not cmd complete (0x0f)
[   88.291313] Bluetooth: hci0: last event is not cmd complete (0x0f)
[  107.311359] Bluetooth: hci0: last event is not cmd complete (0x0f)
...

Answer 1

Try executing the following command in the terminal.

This will download the Broadcom Bluetooth firmware for Linux kernel to /lib/firmware/brcm.

sudo wget --tries=3 --timeout=120 https://github.com/winterheart/broadcom-bt-firmware/raw/master/brcm/BCM20702A1-13d3-3411.hcd -P /lib/firmware/brcm

After installing the firmware, simply reboot to load the driver.