[pulseaudio-discuss] Problem with HSP/HFP profiles with bluetooth devices

[Sean Greenslade]

On Wed, Sep 06, 2023 at 02:46:05PM +0200, Antoine Nauzet wrote:
> Hello,
> 
> I'm working on a Raspberry Pi 4, with an USB Bluetooth dongle, trying to
> connect is to an android device as a hand free device.
> 
> My configuration is the following:
> 
>    - kernel version 6.1.21
>    - bluez version 5.55
>    - Pulseaudio version 14.2
>    - ofono version 1.31
> 
> I manage to make the connection, and the bluetooth device is detected by
> Pulseaudio. The HSP/HFP profile is available. But when making a call, after
> a certain time, the HSP/HFP profile change to unavailable. The device is
> still connected, I can play sound from the android device to the raspberry.
> But the sound from the call is not working anymore.
> 
> What could explain the lost of the profil? Is there something to do to keep
> it up?
> 
> I tried with the last version of pulseaudio, compiling it from the sources
> get from the git repository. The version is now 16.99.1-8-g13ef0.
> Now, when connecting the device, both HSP and HFP are not available! I
> could not get them to be up.
> 
> Is there anything I have to do to make it work? When installing pulseaudio
> with apt-get, I was installing pulseaudio and pulseaudio-module-bluetooth.
> Is there something to include it when installing from the sources?
> 
> What should I check to start figured out what is going on?
> 
> Thank you for your help
> Antoine

I would start with using your distro's pulse package and checking both
the system logs and the pulseaudio logs. I would expect there to be some
chatter when a bluetooth device event like that happens.

--Sean