SDP couldn't discovery any device or service (stlc2500)

The environment i used is BT Module (STLC2500) with bluez 3.26 running on Montavista kernel 2.6.18.

Here is hciconfig output:
# hciconfig -a
hci0: Type: UART
BD Address: 00:80:E1:00:AB:BA ACL MTU: 1021:7 SCO MTU: 0:0
UP RUNNING PSCAN ISCAN
RX bytes:718 acl:0 sco:0 events:23 errors:0
TX bytes:369 acl:0 sco:0 commands:23 errors:0
Features: 0xff 0xeb 0x8d 0xfe 0x9b 0xe9 0x00 0x00
Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
Link policy: RSWITCH HOLD SNIFF PARK
Link mode: ACCEPT MASTER
Name: 'BlueZ (0)'
Class: 0x080100
Service Classes: Capturing
Device Class: Computer, Uncategorized
HCI Ver: 2.0 (0x3) HCI Rev: 0x402 LMP Ver: 2.0 (0x3) LMP Subver: 0x520
Manufacturer: ST Microelectronics (48)

I wonder only from the output of 'hciconfig -a ',could i make sure that the BT Module i used has really got up?

The following is the output from 'hcidump -x -V &' when trying 'sdptool browse' and 'hcitool scan':
# hcidump -x -V &
# HCI sniffer - Bluetooth packet analyzer ver 1.41
device: hci0 snap_len: 1028 filter: 0xffffffff
# sdptool browse
Inquiring ...
< HCI Command: Inquiry (0x01|0x0001) plen 5
lap 0x9e8b33 len 10 num 20
> HCI Event: Command Status (0x0f) plen 4
Inquiry (0x01|0x0001) status 0x00 ncmd 1
> HCI Event: Inquiry Complete (0x01) plen 1
status 0x00
> HCI Event: Command Status (0x0f) plen 4
Unknown (0x00|0x0000) status 0x00 ncmd 2
# hcitool scan
Scanning ...
< HCI Command: Inquiry (0x01|0x0001) plen 5
lap 0x9e8b33 len 8 num 0
> HCI Event: Command Status (0x0f) plen 4
Inquiry (0x01|0x0001) status 0x00 ncmd 1
> HCI Event: Inquiry Complete (0x01) plen 1
status 0x00
> HCI Event: Command Status (0x0f) plen 4
Unknown (0x00|0x0000) status 0x00 ncmd 2

It couldn't discovery any services with 'sdptool browse' or 'hcitool scan' ,although there's a bt headset openned.
It seems that it has a right 'hciconfig -a' output ,but still could not work.Is it a hardware problem or software problem?

Could someone give me some hints?
Any help would be much appreciated!

Best Regards
Benson


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