Bluetooth alsa

a2play works pretty well (the sound is a tiny bit
scratchy). When trying to use the alsa plugin I get this:
DEBUG: _snd_pcm_a2dp_open: name pcm.headphone mode 0
DEBUG: _snd_pcm_a2dp_open: bdaddr/dest is 00:07:A4:B6:F9:71
DEBUG: a2dp_alloc: init
DEBUG: a2dp_connect: a2dp 0x74f0a0
DEBUG: connect_l2cap: Can't connect to
71:F9:B6:A4:07:00 on psm 25. Resource temporarily
unavailable(11)
DEBUG: connect_l2cap: Can't connect to
71:F9:B6:A4:07:00 on psm 25. Resource temporarily
unavailable(11)
DEBUG: connect_l2cap: Connected [imtu 672, omtu 895,
flush_to 65535]
DEBUG: connect_stream: Sent the Stream End Point
Discovery Command
DEBUG: connect_stream: retrying discover response read...
DEBUG: connect_stream: Got a Stream End Point Discovery
Response
DEBUG: connect_stream: received 1 capabilities
DEBUG: process_seid: SEID = 1
DEBUG: process_seid: Requested Capabilities for SEID = 1
DEBUG: process_seid: Got capabilities response
DEBUG: process_seid: headset does not support this
channel mode
DEBUG: process_seid: headset does not support this
allocation_method
DEBUG: process_seid: headset does not support this
subbands setting
DEBUG: process_seid: Sent set configurations command
DEBUG: process_seid: Set configurations command rejected
DEBUG: process_seid: Sent open stream command
DEBUG: process_seid: Didn't receive open response
confirm for SEID = 1
DEBUG: connect_stream: couldn't locate the correct seid

While attempting to use the alsa plugin I get the
following from hcidump -aV:

HCI sniffer - Bluetooth packet analyzer ver 1.28
device: hci0 snap_len: 1028 filter: 0xffffffffffffffff
< HCI Command: Create Connection (0x01|0x0005) plen 13
bdaddr 00:07:A4:B6:F9:71 ptype 0xcc18 rswitch 0x01
clkoffset 0x0000
Packet type: DM1 DM3 DM5 DH1 DH3 DH5
> HCI Event: Command Status (0x0f) plen 4
Create Connection (0x01|0x0005) status 0x00 ncmd 1
> HCI Event: Link Key Request (0x17) plen 6
bdaddr 00:07:A4:B6:F9:71
< HCI Command: Link Key Request Reply (0x01|0x000b) plen 22
bdaddr 00:07:A4:B6:F9:71 key
ECC1F7E4BC91A906A44D0ACF3481FC93
> HCI Event: Command Complete (0x0e) plen 10
Link Key Request Reply (0x01|0x000b) ncmd 1
status 0x00 bdaddr 00:07:A4:B6:F9:71
> HCI Event: Connect Complete (0x03) plen 11
status 0x00 handle 2 bdaddr 00:07:A4:B6:F9:71 type
ACL encrypt 0x01
< ACL data: handle 2 flags 0x02 dlen 12
L2CAP(s): Connect req: psm 25 scid 0x0040
< HCI Command: Write Link Policy Settings (0x02|0x000d)
plen 4
handle 2 policy 0x0f
Link policy: RSWITCH HOLD SNIFF PARK
> HCI Event: Max Slots Change (0x1b) plen 3
handle 2 slots 5
> HCI Event: Command Complete (0x0e) plen 6
Write Link Policy Settings (0x02|0x000d) ncmd 1
status 0x00 handle 2
> HCI Event: Number of Completed Packets (0x13) plen 5
handle 2 packets 1
> ACL data: handle 2 flags 0x02 dlen 16
L2CAP(s): Connect rsp: dcid 0x0068 scid 0x0040
result 1 status 2
Connection pending - Authorization pending
> ACL data: handle 2 flags 0x02 dlen 16
L2CAP(s): Connect rsp: dcid 0x0068 scid 0x0040
result 0 status 0
Connection successful
< ACL data: handle 2 flags 0x02 dlen 12
L2CAP(s): Config req: dcid 0x0068 flags 0x00 clen 0
> ACL data: handle 2 flags 0x02 dlen 16
L2CAP(s): Config req: dcid 0x0040 flags 0x00 clen 4
MTU 895
< ACL data: handle 2 flags 0x02 dlen 14
L2CAP(s): Config rsp: scid 0x0068 flags 0x00 result
0 clen 0
Success
> HCI Event: Number of Completed Packets (0x13) plen 5
handle 2 packets 1
> HCI Event: Number of Completed Packets (0x13) plen 5
handle 2 packets 1
> ACL data: handle 2 flags 0x02 dlen 14
L2CAP(s): Config rsp: scid 0x0040 flags 0x00 result
0 clen 0
Success
< ACL data: handle 2 flags 0x02 dlen 7
L2CAP(d): cid 0x0068 len 3 [psm 25]
AVDTP(s): Discover cmd: transaction 0
.
> HCI Event: Number of Completed Packets (0x13) plen 5
handle 2 packets 1
> ACL data: handle 2 flags 0x02 dlen 8
L2CAP(d): cid 0x0040 len 4 [psm 25]
AVDTP(s): Discover rsp: transaction 0
ACP SEID 1 - Audio Sink
< ACL data: handle 2 flags 0x02 dlen 7
L2CAP(d): cid 0x0068 len 3 [psm 25]
AVDTP(s): Capabilities cmd: transaction 1
ACP SEID 1
< ACL data: handle 2 flags 0x02 dlen 18
L2CAP(d): cid 0x0068 len 14 [psm 25]
AVDTP(s): Set config cmd: transaction 2
ACP SEID 1 - INT SEID 1
Media Transport
Media Codec - SBC
44.1kHz
Stereo
16 Blocks
8 Subbands
SNR
Bitpool Range 241-170
< ACL data: handle 2 flags 0x02 dlen 7
L2CAP(d): cid 0x0068 len 3 [psm 25]
AVDTP(s): Open cmd: transaction 3
ACP SEID 1
< ACL data: handle 2 flags 0x02 dlen 12
L2CAP(s): Disconn req: dcid 0x0068 scid 0x0040
> HCI Event: Number of Completed Packets (0x13) plen 5
handle 2 packets 1
> HCI Event: Number of Completed Packets (0x13) plen 5
handle 2 packets 1
> HCI Event: Number of Completed Packets (0x13) plen 5
handle 2 packets 1
> HCI Event: Number of Completed Packets (0x13) plen 5
handle 2 packets 1
> HCI Event: Disconn Complete (0x05) plen 4
status 0x00 handle 2 reason 0x08
Reason: Connection Timeout

I really am out of my depth in all this, but the
"Bitpool Range" looks funny to me. When I successfully
use a2play it gives a very different "Bitpool Range:"

> ACL data: handle 4 flags 0x02 dlen 16
L2CAP(d): cid 0x0041 len 12 [psm 25]
AVDTP(s): Capabilities rsp: transaction 1
Media Transport
Media Codec - SBC
16kHz 32kHz 44.1kHz 48kHz
Mono DualChannel Stereo JointStereo
4 8 12 16 Blocks
4 8 Subbands
SNR Loudness
Bitpool Range 2-33
< ACL data: handle 4 flags 0x02 dlen 18
L2CAP(d): cid 0x0045 len 14 [psm 25]
AVDTP(s): Set config cmd: transaction 2
ACP SEID 1 - INT SEID 1
Media Transport
Media Codec - SBC
44.1kHz
Stereo
16 Blocks
8 Subbands
SNR
Bitpool Range 2-33


If you need more info please email me. I'd love to get
this working with the alsa plugin. Oh, and I don't know
if this matters but this is on an AMD64 / Ubuntu Dapper
Drake, but I got similar results on an i386 (Athlon) /
Debian Sid box. Also, a2play works quite well on my
Sharp Zaurus C1000 in fixed point mode.

-John ( johnxx@gmail.com )