[pulseaudio-discuss] Problem with bluez5 and a2dp.

[Prathyush Thota]

Hello,

I have been trying my luck with bluez5.21 (built from source) and
pulseaudio (built from pulseaudio/vudentzs-mainline:hfp-ofono-5.0). My
intention is to get my Ubuntu 14.10 installation to be a handsfree unit.
But, I had trouble getting HFP and A2DP to work.

bluetoothctl shows that the 'Audio Source' and 'Audio Sink' profiles are
registered:

[bluetooth]# show
Controller 7C:E9:D3:DD:XX:XX
    Name: wolv
    Alias: ubuntu-0
    Class: 0x2c010c
    Powered: yes
    Discoverable: yes
    Pairable: yes
    UUID: PnP Information           (00001200-0000-1000-8000-00805f9b34fb)
    UUID: Generic Access Profile    (00001800-0000-1000-8000-00805f9b34fb)
    UUID: Generic Attribute Profile (00001801-0000-1000-8000-00805f9b34fb)
    UUID: A/V Remote Control        (0000110e-0000-1000-8000-00805f9b34fb)
    UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
    UUID: Handsfree                 (0000111e-0000-1000-8000-00805f9b34fb)
    UUID: Audio Source              (0000110a-0000-1000-8000-00805f9b34fb)
    UUID: Audio Sink                (0000110b-0000-1000-8000-00805f9b34fb)
    Modalias: usb:v1D6Bp0246d0515
    Discovering: no
[bluetooth]#

The debug log of pulseaudio had a bunch of messages similar to this :

D: [alsa-sink-CX20590 Analog] module-loopback.c: Requesting rewind due to
end of underrun.
D: [alsa-sink-CX20590 Analog] alsa-sink.c: Requested to rewind 65536 bytes.
D: [alsa-sink-CX20590 Analog] alsa-sink.c: Limited to 46336 bytes.
D: [alsa-sink-CX20590 Analog] alsa-sink.c: before: 5792
D: [alsa-sink-CX20590 Analog] alsa-sink.c: after: 0
I: [alsa-sink-CX20590 Analog] alsa-sink.c: Tried rewind, but was apparently
not possible.

Here's the complete debug log (when I tried to switch the audio sink on my
phone to bluetooth):

http://pastebin.com/8ACF92Sk

There were similar messages when I try to make a call using the test
scripts in ofono.

I'm not sure if it's relevant but - I had to uncomment few lines in
default.pa to load the alsa-sink and alsa-source (instead of relying on the
auto detect) modules to get audio to work on my ubuntu installation with
pulseaudio running. Otherwise, the null-sink was being picked up instead of
alsa-sink.

Any thoughts on why this is happening ?

Thanks,
Prathyush
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