After fresh instal of Ubuntu 18.04 on Yoga 3 pro Bluetooth didn't work
output had a line as the following:
hci0: BCM: Patch brcm/BCM20702A1-0489-e07a.hcd not found
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I downloaded 'BCM20702A1-0489-e07a.hcd' from https://github.com/winterheart/broadcom-bt-firmware/tree/master/brcm and copied it to /lib/firmware/brcm/
maybe the easiest way to put it in the console:
sudo wget https://github.com/winterheart/broadcom-bt-firmware/tree/master/brcm/BCM20702A1-0489-e07a.hcd
After restart the Bluetooth worked again...