Hi Norbert,

Please don't top-post on this mailing list.  That's just our convention 
here.  Anyway, see below:

On 02/01/2015 08:00 AM, Norbert Huffschmid wrote:
> Hi Denis,
>
> now I have installed ofono from the debian jessie testing branch (which
> has packaged ofono 1.15-2). Bluez is still version 4.99 and all the rest
> is debian wheezy as before. Now the list-modems.py script does not show
> any modem any more. Are there dependency issues?
>

BlueZ4 requires --with-bluez4 when configuring oFono.

> I already had tried a combination of ofono 1.15-2 and Bluez 5.23, which
> was quite promising. I could successfully establish a phone call by
> means of the dial-number.py script. But there was no voice connection
> established between the endpoints. This was quite astonishing because
> A2DP streaming from the smartphone to the Raspberry Pi worked like a
> charm. And I don't think that it was a phone issue because a HFP
> connection from the phone to a navigation device works well too.
>

oFono and BlueZ are not the only ones at play.  The audio is handled by 
PulseAudio.  So I would check on the PulseAudio mailing list which 
version of PulseAudio you need.

> I have read somewhere that Bluez5 does not support HFP at all, so I did
> not further follow this approach.

Correct, sort of.

>
> Any proposal which combination of ofono and Bluez is most promising in
> order to establish a HFP voice connection?
>

As mentioned before, BlueZ and oFono are not the problem here.  Check 
back with PulseAudio folks.

Regards,
-Denis