Re: [Bluez-users] BlueZ and Headset

Mahtab Hossain
2008-04-04T12:08:48Z

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Dear users,

The problem of headset not pairing was there because my Nokia headset had reached its upper limit on the number of pairings. :)
By going through the headset's manual, I could delete all the stored pairings there in the headset and now it can be paired alright with my Laptop.

But still I am not successful in making it work. Whenever I turn-on the headset, it is automatically paired with the Laptop and I see an ACL connection being established like this:
> ACL 00:03:89:B0:58:91 handle 42 state 1 lm MASTER AUTH ENCRYPT SECURE

When I try to play song using mplayer, it stops right before "playing" for a long time and I see lots of SCO packets flying (saw it through hcidump) like below:

> SCO data: handle 45 flags 0x00 dlen 48
0000: 6b 00 6e 00 35 01 7e 01 03 01 cc 00 65 00 71 00 k.n.5.~.....e.q.
0010: f9 00 51 01 6e 01 17 01 48 01 0e 01 37 00 b8 00 ..Q.n...H...7...
0020: b0 00 63 00 a1 00 55 00 d5 00 aa 00 3e 00 d8 00 ..c...U.....>...

After sometime, mplayer fails to play with this error:
[AO_ALSA] alsa-lib: pcm_bluetooth.c:1179:(bluetooth_cfg) Error 22 while configuring device
[AO_ALSA] Playback open error: Invalid argument
Could not open/initialize audio device -> no sound.

But I see the SCO packets moving still in hcidump window. I see two connections at this time:

< eSCO 00:03:89:B0:58:91 handle 0 state 8 lm SLAVE
> ACL 00:03:89:B0:58:91 handle 42 state 1 lm MASTER AUTH ENCRYPT SECURE

The SCO packets goes flying until I turn off my headset or disconnect. Even if I turn off my headset, I still find this connection with "hcitool con" command:

Connections:
< eSCO 00:03:89:B0:58:91 handle 0 state 9 lm SLAVE

Would really be helpful if someone explains to me about what is actually going on here.

My .asoundrc file looks like this:
pcm.bluetooth {
type bluetooth
device 00:03:89:B0:58:91
profile "auto"
}

Regards
Mahtab

Mahtab Hossain <mahtab_hossain2002@yahoo.com> wrote: Hi,

I have a Nokia HDW-3 which has been used with btsco successfully before in Fedora 4. Now, it seems I can't somehow pair it.

Here is my hcid.conf file look like:
options {
# Automatically initialize new devices
autoinit yes;

security user;

pairing multi;

# Default PIN code for incoming connections
passkey "BlueZ";
}

hcitool scan or inq can find the headset. And I also have successfully paired with my Motorola Mobile Phone (entering PIN at both Phone and Laptop side) - so I think pairing can be done with the current state of my bluez stack.

The hcidump -X -V always gives me the following results whenever I try to connect with my headset or run some command like, hcitool info <bt-addr of headset> or send direct command like CreateBonding through dbus or even when I switch-on my headset (I wonder why my dongle wants to connect with the headset since I have not saved any information of my headset in the Laptop).

HCI sniffer - Bluetooth packet analyzer ver 1.40
device: hci0 snap_len: 1028 filter: 0xffffffff
> HCI Event: Connect Request (0x04) plen 10
bdaddr 00:03:89:B0:58:91 class 0x200404 type ACL
< HCI Command: Accept Connection Request (0x01|0x0009) plen 7
bdaddr 00:03:89:B0:58:91 role 0x01
Role: Slave
> HCI Event: Command Status (0x0f) plen 4
Accept Connection Request (0x01|0x0009) status 0x00 ncmd 1
> HCI Event: Link Key Request (0x17) plen 6
bdaddr 00:03:89:B0:58:91
< HCI Command: Link Key Request Negative Reply (0x01|0x000c) plen 6
bdaddr 00:03:89:B0:58:91
> HCI Event: Command Complete (0x0e) plen 10
Link Key Request Negative Reply (0x01|0x000c) ncmd 1
status 0x00 bdaddr 00:03:89:B0:58:91
> HCI Event: Connect Complete (0x03) plen 11
status 0x06 handle 42 bdaddr 00:03:89:B0:58:91 type ACL encrypt 0x00
Error: PIN or Key Missing

These are my current bluetooth packages:

rpm -qa | grep bluez*

bluez-utils-3.20-6.fc8
gnome-bluetooth-0.10.0-1.fc8
bluez-libs-3.20-1.fc8
bluez-hcidump-1.40-1.fc8
bluez-utils-cups-3.20-6.fc8
bluez-gnome-0.14-8.fc8
bluez-gnome-analyzer-0.14-8.fc8
pybluez-0.9.2-1.fc7
bluez-utils-alsa-3.20-6.fc8
gnome-bluetooth-libs-0.10.0-1.fc8
bluez-libs-devel-3.20-1.fc8

It would be really helpful if somebody can point me somewhere why the pairing isn't happening.

Thanks
Mahtab

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