I have a problem that at first looks similar to the one here:
After working on this for hours, I was grateful to come across that webpage, giving hope. My Agptek headset (no Dongle -- just Bluetooth direct to a Lenovo Thinkpad) worked fine on Windows 8.2. When I changed the O/S on the machine to Ubuntu 16.04 LTS, I got symptoms similar to those at the above link: the headphones only worked in A2DP, and, if I change the input sound source (from Thinkpad's internal mic to Agptek's mic) then the input and output sound both stop working. So, in Ubuntu my headset is basically reduced to a pair of headphones, with no mic.
Interesting to learn at the link above that HSP/HFP has to work in order for the mic to work. I'm still new to this.
The output of lsusb is:
Bus 002 Device 002: ID 5986:0299 Acer, Inc Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 002: ID 0a5c:21f3 Broadcom Corp. Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 005 Device 004: ID 045e:00db Microsoft Corp. Natural Ergonomic Keyboard 4000 V1.0 Bus 005 Device 003: ID 1a7c:0192 Evoluent Bus 005 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
I have PulseAudio Volume Control and I use the standard Bluetooth system that comes with Ubuntu. I tried Blueman to get around this problem, but that didn't work so I restored the desktop to default settings again.
Any ideas on next steps? Thanks very much.