[pulseaudio-discuss] Bluetooth Headset Problem with BlueZ-5.38 and Pulseaudio 8.0

[Tanu Kaskinen]

On Wed, 2016-08-24 at 18:26 +0700, Hieu Le wrote:
> Thanks for your instruction.
> 
> Today, I tried to use hcidump to capture the Bluetooth events in two
> cases:
> 
> 1. Switch to headset_head_unit profile:
> < HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17
>     handle 1 voice setting 0x0060 ptype 0x0380
> > 
> > HCI Event: Command Status (0x0f) plen 4
>     Setup Synchronous Connection (0x01|0x0028) status 0x1a ncmd 1
>     Error: Unsupported Remote Feature / Unsupported LMP Feature
> < HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17
>     handle 1 voice setting 0x0060 ptype 0x0380
> > 
> > HCI Event: Command Status (0x0f) plen 4
>     Setup Synchronous Connection (0x01|0x0028) status 0x1a ncmd 1
>     Error: Unsupported Remote Feature / Unsupported LMP Feature
> < HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17
>     handle 1 voice setting 0x0060 ptype 0x03c8
> > 
> > HCI Event: Command Status (0x0f) plen 4
>     Setup Synchronous Connection (0x01|0x0028) status 0x1a ncmd 1
>     Error: Unsupported Remote Feature / Unsupported LMP Feature
> < HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17
>     handle 1 voice setting 0x0060 ptype 0x03c4
> > 
> > HCI Event: Command Status (0x0f) plen 4
>     Setup Synchronous Connection (0x01|0x0028) status 0x00 ncmd 1
> > 
> > HCI Event: Synchronous Connect Complete (0x2c) plen 17
>     status 0x00 handle 257 bdaddr 00:1F:81:34:08:22 type SCO
>     Air mode: CVSD
> > 
> > HCI Event: Max Slots Change (0x1b) plen 3
>     handle 1 slots 3
> < SCO data: handle 257 flags 0x00 dlen 48
> < SCO data: handle 257 flags 0x00 dlen 48
> > 
> > HCI Event: Max Slots Change (0x1b) plen 3
>     handle 1 slots 1
> 
> 2. When using parecord to capture audio input from headset:
> However, in this case, hcidump captured nothing !!! It is very odd
> !!!!
> 
> Do you have any suggestion or advice for this?

My only advice is to try asking the bluez developers. I have no idea
what is wrong. It looks to me that this is not a pulseaudio bug, but
without knowing the root cause, I can't be sure of that.

-- 
Tanu