Debian Linux Dell XPS 9550 and Sennheiser Bluetooth headphones
This applies to most bluetooth headphones under Linux, with Dell XPS 9550 laptops (well, probably to other systems using a broadcom BT chip).
Problem: If I went to the Bluetooth settings in Gnome, I could enable scanning, but my headphones would not appear in the list of available devices. I made sure that I reset the BT pairing completely on the headphones, and then set them in pairing mode. To double-check, I re-paired them with my phone.
Lead: Ubuntu Bug 1589889 describes a similar situation, and recommends installing a specific firmware. Also found this stack exchange post.
1- Find the exact broadcom device ID
# lspci -nnk | grep -iA2 net; lsusb; rfkill list all; dmesg | egrep -i 'blue|firm' [...] Bluetooth: hci0: BCM20703A1 bluetooth hci0: Direct firmware load for brcm/BCM-0a5c-6410.hcd failed with error -2 Bluetooth: hci0: BCM: Patch brcm/BCM-0a5c-6410.hcd not found
2- Download the firmware
$ wget https://github.com/winterheart/broadcom-bt-firmware/raw/master/brcm/BCM20703A1-0a5c-6410.hcd # cp BCM20703A1-0a5c-6410.hcd /lib/firmware/brcm/BCM-0a5c-6410.hcd # chown root.root /lib/firmware/brcm/BCM-0a5c-6410.hcd
3- Reboot (I could not figure what to restart to avoid a reboot)
The device should now pair as expected. Once paired, you may also need to go to the sound settings and select the headphones as the default sound device.
Author Mathieu Lu