Re: [Bluez-devel] No sound in bluetooth headset

Rahul Tank
2006-12-12T10:29:50Z

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On 12/12/06, Brad Midgley <bmidgley@xmission.com> wrote:
>
> Nel
>
> > Hello all,
> > I am trying the new bluetooth-alsa plugin as mentioned
> > https://help.ubuntu.com/community/BluetoothAudio.
> >
> > All goes fine but while playing a file via "aplay" i get absolutely no
> > sound output.The previous way of a btsco kernel module worked out of the
> > box.
> > any pointers ???. ..
>
> it may be a limit of your adapter. I improved the docs above with the
> long troubleshooting list.
>
> Brad
>
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I had gone through the troubleshooting list and this is my finding . Plz
help me if i am missing something obvious.

1. output of hciconfig -a
hci0: Type: USB
BD Address: 00:08:1B:87:DC:CD ACL MTU: 192:8 SCO MTU: 64:8
UP RUNNING PSCAN ISCAN AUTH ENCRYPT
RX bytes:1076266 acl:110 sco:21037 events:163 errors:0
TX bytes:51014 acl:75 sco:961 commands:48 errors:0
Features: 0xff 0xff 0x8f 0xf8 0x18 0x18 0x00 0x80
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH HOLD SNIFF PARK
Link mode: ACCEPT MASTER
Name: 'Mylinux'
Class: 0x3e0100
Service Classes: Networking, Rendering, Capturing, Object Transfer,
Audio
Device Class: Computer, Uncategorized
HCI Ver: 1.2 (0x2) HCI Rev: 0x512 LMP Ver: 1.2 (0x2) LMP Subver:
0x512
Manufacturer: Cambridge Silicon Radio (10)

2. output of hciconfig hci0 revision
hci0: Type: USB
BD Address: 00:08:1B:87:DC:CD ACL MTU: 192:8 SCO MTU: 64:8
HCI 18.2
Chip version: BlueCore3-ROM
Max key size: 128 bit
SCO mapping: HCI

3. output of hcitool info 00:07:a4:5c:64:f0
Requesting information ...
BD Address: 00:07:a4:5c:64:f0
Device Name: Motorola HS850
LMP Version: 1.2 (0x2) LMP Subversion: 0x5dd
Manufacturer: Cambridge Silicon Radio (10)
Features: 0xfc 0xff 0x8b 0xf8 0x18 0x18 0x00 0x80
<encryption> <slot offset> <timing accuracy> <role switch>
<hold mode> <sniff mode> <park state> <RSSI> <channel
quality>
<SCO link> <HV2 packets> <HV3 packets> <u-law log> <A-law
log>
<CVSD> <paging scheme> <transparent SCO> <broadcast encrypt>

<enhanced iscan> <interlaced iscan> <interlaced pscan>
<inquiry with RSSI> <extended SCO> <AFH cap. slave>
<AFH class. slave> <AFH cap. master> <AFH class. master>
<extended features>

4. kernel version ; 2.6.17
bluez-utils and bluez-libs: 3.7

The fact that the btsco kernel module worked perfectly well is confusing me
more..

Any pointers ??

thanks in advance

cheers,
Nel.

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