Unable to play music on mobile phone over bluetooth

Unable to play music on mobile phone over bluetooth

[Douglas Lopes Pereira]

Hi guys,

I'm facing some problems while playing music on my N95 phone over a
bluetooth conection and trying to record it with arecord.

Here is what I'm doing:

- I have bluez 4.41 installed on my 2.6.30 system.
- My bluetooth dongle is recognized as (hciconfig -a):
  hci0:   Type: USB
        BD Address: 00:10:60:30:1A:2D ACL MTU: 384:8 SCO MTU: 64:8
        UP RUNNING PSCAN
        RX bytes:10886 acl:31 sco:0 events:395 errors:0
        TX bytes:1961 acl:26 sco:0 commands:139 errors:0
        Features: 0xff 0xff 0x8f 0xfe 0x9b 0xf9 0x00 0x80
        Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
        Link policy: RSWITCH HOLD SNIFF PARK
        Link mode: SLAVE ACCEPT
        Name: 'debian-0'
        Class: 0x4a0204
        Service Classes: Networking, Capturing, Telephony
        Device Class: Phone, Cellular
        HCI Ver: 2.0 (0x3) HCI Rev: 0x7a6 LMP Ver: 2.0 (0x3) LMP Subver: 0x7a6
        Manufacturer: Cambridge Silicon Radio (10)

- I started the simple-agent:
   Agent registered

- I started a conection on my phone to my bluetooth device, inserted
the PIN and it seems to work:
  RequestPinCode (/org/bluez/2471/hci0/dev_00_
1F_5D_3A_01_2D)

- On the cellphone a parenthesis involving the bluetooth simbol means
a conection established.
  In this case, the parenthesis are shown, then they desapear, they
are shown again for a few seconds and desapear :(

- Last configuration is to add following lines to ~/.asoundrc

pcm.bluetooth {
   type bluetooth
   device "00:1F:5D:3A:01:2D"
   profile "auto"
}

- When I start arecord (arecord -D bluetooth) this is what I get:

ALSA lib pcm_bluetooth.c:1607:(audioservice_expect)
BT_GET_CAPABILITIES failed : Input/output error(5)
arecord: main:590: audio open error: Input/output error

- By the way, if I start playing music on my phone, it uses the main
speaker, and no audio is sent via bluetooth (I checked with hcidump)

- I tryed with 2 different dondles and 2 different mobile phones.

Does anyone has a clue? Can anybody help me and point what I am doing wrong?

Thanks in advance.
Douglas

Re: Unable to play music on mobile phone over bluetooth

[Johan Hedberg]

Hi,

On Thu, Jun 18, 2009, Douglas Lopes Pereira wrote:
> I'm facing some problems while playing music on my N95 phone over a
> bluetooth conection and trying to record it with arecord.
<snip>
> Does anyone has a clue? Can anybody help me and point what I am doing wrong?

I don't think you're doing anything wrong but just something that's not
supported by bluez yet. However, A2DP Sink role is being implemented in
Google SoC this year so if you're patient your use case might become
possible soon.

Johan

Re: Unable to play music on mobile phone over bluetooth

[Douglas Lopes Pereira]

Hi,

On Fri, Jun 19, 2009 at 10:53 AM, Johan Hedberg <johan.hedberg@gmail.com> wrote:
>
> Hi,
>
> On Thu, Jun 18, 2009, Douglas Lopes Pereira wrote:
> > I'm facing some problems while playing music on my N95 phone over a
> > bluetooth conection and trying to record it with arecord.
> <snip>
> > Does anyone has a clue? Can anybody help me and point what I am doing wrong?
>
> I don't think you're doing anything wrong but just something that's not
> supported by bluez yet. However, A2DP Sink role is being implemented in
> Google SoC this year so if you're patient your use case might become
> possible soon.
>
> Johan

Thanks Johan.
I´m facing some similar problems with my Bluetooth headset.
I will send another e-mail to the mailing list since it has another subject.
Please, read my other e-mail if you have a chance.

Douglas