Hi all,

throwing in my experience:
Sony WH-H910N,
ThinkPad P1 Gen 2,
Bus 001 Device 007: ID 8087:0029 Intel Corp. 

Worked under 18.04
When upgraded to 20.04 rcX (before it was released), still kept working. Not 
much later - already on released 20.04 - with a fw/kernel/whatever upgrade it 
stopped working in HSP/HFP mode.

Since there were errors in dmesg related to the FW loading, I downloaded 
upstream FW from git, put them under /lib/firmware, and added a dpkg-diversion 
for the package provided versions, so that it survives an upgrade:
dpkg-divert --list | grep ibt
local diversion of /lib/firmware/intel/ibt-20-1-3.sfi to 
/lib/firmware/intel/ibt-20-1-3.sfi.dist
local diversion of /lib/firmware/intel/ibt-20-1-3.ddc to 
/lib/firmware/intel/ibt-20-1-3.ddc.dist


Headphones Sony WH-H910N do work out of the box on a different system with the 
same distro - with BT HW 8087:0a2a.

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https://bugs.launchpad.net/bugs/1871794

Title:
  [Bluetooth] No audio output/input in HSP/HFP mode

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