https://bugs.freedesktop.org/show_bug.cgi?id=93898
--- Comment #1 from Tanu Kaskinen <[email protected]> ---
This bug was again brought up on the mailing list, and as I re-read your
report, I noticed an important difference between the two devices: the working
one has both "Headset" (HSP) and "Handsfree" (HFP) profiles, but the broken one
only has "Handsfree".
The native backend in PulseAudio only supports HSP, so if the headset only
supports HFP, that's not going to work.
Should we implement HFP in PulseAudio? I'm not sure. It was debated a lot
whether it makes architectural sense to even implement HSP in an audio server,
and HFP is an even more complicated protocol than HSP. In any case, I'm not
volunteering to do the implementation. One possibility would be to tell
everybody to use oFono, but at least when PulseAudio 6.0 was released, the
oFono backend didn't support headsets (it only supported the scenario where
PulseAudio is on the headset/handsfree device, i.e. wrong direction). I don't
remember if the lack of headset support with oFono was due to lacking
functionality in oFono or PulseAudio or both, and if it was due to lacking
functionality in oFono, I don't know if the missing stuff has been implemented
since then.
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