[pulseaudio-discuss] HSP and HFP profiles for hands-free telephony

Georg Chini georg at chini.tk
Fri Mar 22 18:49:14 UTC 2019

On 22.03.19 10:59, Mohammed Sha wrote:
> Hi Georg,
> Thanks for the quick response.
> You should consider using ofono to connect your phone to the PC. It 
> has all the
> telephony functions you need and it works well together with PA. See here
> for a short introduction:
> https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Bluetooth/
> I have tried using ofono for connection, but below error is coming 
> continuously when call is initiated
> $ /ofono/test/enable-modem
> /Bluetooth: hci0 SCO packet for unknown connection handle 0/
As already said, I cannot help you much with the bluetooth stack related 

> This looks like an error from the bluetooth stack, probably pulseaudio
> cannot correct it. I experienced problems with some Bluetooth dongles,
> have you tried another one?
> I havent tried with other module, The Module which i am using is 
> QCA6174A, which will support HFP profile as per documents.
> Do we need to route SCO audio as mentioned on section 5.0 in 
> https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Bluetooth 
> ? 
> <https://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Bluetooth/>
Some adapters have issues and need firmware or the correct audio routing.
If firmware is missing there should be something in dmesg.
I think you have to experiment a bit and maybe buy another dongle.


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