If you have been using Linux for a while, you would know Bluetooth and Linux don’t go well. Whatever may be the reason, it’s always face problem when you update Linux versions. Recently, since my upgrade to Ubuntu 20.04, I have come to notice that Bluetooth devices stop working. I check my system not able to found Bluetooth adapter. I dug on it a lot and tried so many software and method to debug the issue I’m listing down one worked for me:
dmesg | grep -i bluetooth # Shows all Bluetooth driver info dmesg | grep -i bluetooth | grep -i firmware # Shows Bluetooth firmware issues
In last command you can see this issue in firmware. As you can see, you need brcm/BCM20702A1-0b05-17cb.hcd firmware.
Down load this git repository and find file in to the downloaded folder BCM20702A1-0b05-17cb.hcd
Replace .hcd file to /lib/firmware/brcm and reboot your computer.
sudo cp BCM20702A1-0b05-17cb.hcd /lib/firmware/brcm/
That all after reboot you can see working Bluetooth.
Follow this link https://github.com/winterheart/broadcom-bt-firmware