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This repository contains pre-compiled binaries of the current Raspberry Pi kernel and modules, userspace libraries, and bootloader/GPU firmware.
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Raspberry Pi 3 bluetooth connect and disconnect #1092

Open ram94638 opened 5 years ago

ram94638 commented 5 years ago

I have RPI 3B, When I connect to device with using password It connect for few seconds then disconnect, After that I installed blueman and try to connect then it configured serial port and get connected. But I turn off to bluetooth,pi or device its not connect automatically. Again same process by manually connect. Although I have paired and trust to that device. Any solution?

ram94638 commented 5 years ago

Already Done these changes, But issue still

Edit /etc/systemd/system/dbus-org.bluez.service

sudo nano /etc/systemd/system/dbus-org.bluez.service

Add a -C to the line ExecStart=/usr/lib/bluetooth/bluetoothd So that it looks like ExecStart=/usr/lib/bluetooth/bluetoothd -C

And then add the following line below it ExecStartPost=/usr/bin/sdptool add SP

So now the file has ExecStart=/usr/lib/bluetooth/bluetoothd -C ExecStartPost=/usr/bin/sdptool add SP

pelwell commented 5 years ago
  1. Which operating system (and which version/release) are you running?
  2. What device is it?
  3. Have you tried replacing the batteries in the device?

If you are running Raspbian then installing Blueman was not a good idea - it is likely to interfere with the built-in Raspbian BT support. If you are not running Raspbian, I am unlikely to be able to support you. Try installing a Raspbian image onto a spare SD card and see if the connection still drops after pairing.

ram94638 commented 5 years ago

I am using Raspbian Strech(9) on Pi 3 V2

ram94638 commented 5 years ago

?

pelwell commented 5 years ago

You answered one out of three questions - your move.

ram94638 commented 5 years ago

2.That is customized device with embedded bluetooth v3,class 1

  1. Battery replaced and it also working on DC power
pelwell commented 5 years ago

Starting with a clean Raspbian, configure it as before but without installing BlueMan. Then before pairing your device, run the following command in a terminal window:

$ sudo btmon -w pair.bts

It will display messages to the window. Now pair and connect your device, waiting for it to disconnect. You could even connect it a second time for good measure.

When you think you have seen the failure a few times, kill the btmon capture with Ctrl-C, then upload pair.bts somewhere I can download it.

N.B. There is only so far I can go to diagnose a fault connecting to a custom device, but the capture might reveal if it is something simple.

jhdgghost commented 5 years ago

Just tested in my rpi3b+ with librelelec 9 build 2019-#0119. The a2dp audio disconnect after 5-15 minutes working with pulse audio.

ram94638 commented 5 years ago

Starting with a clean Raspbian, configure it as before but without installing BlueMan. Then before pairing your device, run the following command in a terminal window:

$ sudo btmon -w pair.bts

It will display messages to the window. Now pair and connect your device, waiting for it to disconnect. You could even connect it a second time for good measure.

When you think you have seen the failure a few times, kill the btmon capture with Ctrl-C, then upload pair.bts somewhere I can download it.

N.B. There is only so far I can go to diagnose a fault connecting to a custom device, but the capture might reveal if it is something simple.

Kindly check file by this link https://drive.google.com/open?id=15fNNvNz4py8EQVsbKlShWsJgRxNdUQiG

pelwell commented 5 years ago

[ @jhdgghost This is a different issue to the one you are experiencing. ]

  1. The log shows an initial pairing request using the default PIN of 0000, which is rejected

  2. This is followed by a second attempt with a real PIN after a delay (presumably while you were typing it in), which is accepted. At this point, pairing has been successful.

  3. The Pi then sends an L2CAP "Extended features supported" request, which is "Not supported".

  4. An L2CAP Connection Request comes next, which is successful.

  5. Both ends agree that the MTU is 256.

  6. An "SDP: Service Search Attribute Request" for L2CAP gets a long response:

    > ACL Data RX: Handle 12 flags 0x02 dlen 147                   [hci0] 88.459415
  Channel: 64 len 143 [PSM 1 mode 0] {chan 0}
  SDP: Service Search Attribute Response (0x07) tid 0 len 138
    Attribute bytes: 135
      Attribute list: [len 54] {position 0}
        Attribute: Service Record Handle (0x0000) [len 2]
          0x00010000
        Attribute: Service Class ID List (0x0001) [len 2]
          UUID (3) with 2 bytes [0 extra bits] len 3
            Serial Port (0x1101)
        Attribute: Protocol Descriptor List (0x0004) [len 2]
          Sequence (6) with 3 bytes [8 extra bits] len 5
            UUID (3) with 2 bytes [0 extra bits] len 3
              L2CAP (0x0100)
          Sequence (6) with 5 bytes [8 extra bits] len 7
            UUID (3) with 2 bytes [0 extra bits] len 3
              RFCOMM (0x0003)
            Unsigned Integer (1) with 1 byte [0 extra bits] len 2
              0x01
        Attribute: Browse Group List (0x0005) [len 2]
          UUID (3) with 2 bytes [0 extra bits] len 3
            Public Browse Root (0x1002)
        Attribute: Unknown (0x0100) [len 2]
          AMP-SPP [len 8]
      Attribute list: [len 73] {position 1}
        Attribute: Service Record Handle (0x0000) [len 2]
          0x00010001
        Attribute: Service Class ID List (0x0001) [len 2]
          UUID (3) with 16 bytes [0 extra bits] len 17
            00000000-deca-fade-deca-deafdecacaff
        Attribute: Protocol Descriptor List (0x0004) [len 2]
          Sequence (6) with 3 bytes [8 extra bits] len 5
            UUID (3) with 2 bytes [0 extra bits] len 3
              L2CAP (0x0100)
          Sequence (6) with 5 bytes [8 extra bits] len 7
            UUID (3) with 2 bytes [0 extra bits] len 3
              RFCOMM (0x0003)
            Unsigned Integer (1) with 1 byte [0 extra bits] len 2
              0x02
          Sequence (6) with 3 bytes [8 extra bits] len 5
            UUID (3) with 2 bytes [0 extra bits] len 3
              PnP Information (0x1200)
        Attribute: Browse Group List (0x0005) [len 2]
          UUID (3) with 2 bytes [0 extra bits] len 3
            Public Browse Root (0x1002)
        Attribute: Unknown (0x0100) [len 2]
          AMP-iAP [len 8]
    Continuation state: 0

    This suggests the device is an "AMP-SPP" and an "AMP-iAP".

  7. A second "SDP: Service Search Attribute Request", this time for PnP Information, gets just the "AMP-iAP" response.

  8. 2 seconds later, the Pi sends an L2CAP Disconnection Request.

  9. A further ~20 seconds later, the device disconnects.

Perhaps the disconnection is because the device is expecting to be used in a particular way, and when the Pi doesn't do it for 20 seconds it gives up.

ram94638 commented 5 years ago

This issue is not only with my particular device, same issue on each bluetooth device.

kilian579 commented 5 years ago

I'm facing a similar issue using a bluetooth button (extended keyboard). The time it actually stays connected seems to range from 5 to 20 minutes. After the connection dropped, it can be regained by running bluetoothctl in the terminal. This step requires closing other programs running in the shell.

chuwwh commented 5 years ago

I am using "HP Bluetooth Keyboard T1000" for months smoothly. Everyday, it runs thru many cycles of connect, sleep(battery save), disconnect, wake up, connect, and the Raspberry Pi 3 B+ handle it smoothly.

But since last week I did a "apt-get update" and "apt-get upgrade", I found my keyboard disconnected. Pairing is successful and keyboard can work as long as it does not go into sleep and disconnect. Once it disconnected, no way it can reconnect. The Pi just repeatedly "connected: yes" and immediately "connected: no".

I trouble shoot it for days in different ways and now notice that when the keyboard got paired under the upgraded environment, it has a class 0x002540. But instead of keep using 0x002540, the Pi recognizes it as 0x000540 during reconnect which is then followed by disconnect.

Now I have to fallback my Pi OS, which pair my keyboard with class 0x000540.

pi@raspberrypi:~ $ cat /etc/os-release PRETTY_NAME="Raspbian GNU/Linux 9 (stretch)" NAME="Raspbian GNU/Linux" VERSION_ID="9" VERSION="9 (stretch)" ID=raspbian ID_LIKE=debian

[HP Bluetooth Keyboard T1000]# info Device 20:73:24:03:36:97 Name: HP Bluetooth Keyboard T1000 Alias: HP Bluetooth Keyboard T1000 Class: 0x000540 Icon: input-keyboard

thomaslc66 commented 5 years ago

Facing same issue with an galaxy s5 device on android.

mudassarn-zz commented 4 years ago

Facing the same issue with multiple bluetooth speakers. It connects for 15-20 seconds and then disconnect afterwards. Is there a solution?

rob-meiner commented 4 years ago

Did this ever get resolved? I am having the same problem with a Raspberry Pi 4b.

This happens with every bluetooth device that I try. In the case shown below, I am attempting to connect to an older Samsung Smartphone. 

pi@antonio:~ $ sudo systemctl status hciuart.service
● hciuart.service - Configure Bluetooth Modems connected by UART
   Loaded: loaded (/lib/systemd/system/hciuart.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Tue 2020-08-04 14:02:57 CEST; 31min ago

Aug 04 14:02:27 antonio systemd[1]: Starting Configure Bluetooth Modems connected by UART...
Aug 04 14:02:57 antonio btuart[5279]: Initialization timed out.
Aug 04 14:02:57 antonio btuart[5279]: bcm43xx_init
Aug 04 14:02:57 antonio systemd[1]: hciuart.service: Control process exited, code=exited, status=1/FAILURE
Aug 04 14:02:57 antonio systemd[1]: hciuart.service: Failed with result 'exit-code'.
Aug 04 14:02:57 antonio systemd[1]: Failed to start Configure Bluetooth Modems connected by UART.

I updated to latest rpi-config using sudo rpi-update and rebooted.

Bluetooth still disconnects within 2-5 seconds of connecting (I xx'ed out the MAC addresses). In the entries at the end of this log, it appears that the disconnection request is coming from the raspberry pi.

pi@antonio:~ $ sudo bluetoothctl
Agent registered
[bluetooth]# pairable on
Changing pairable on succeeded
[bluetooth]# discoverable on
Changing discoverable on succeeded
[CHG] Controller DC:A6:XX:XX:XX:XX Discoverable: yes
[CHG] Device 44:78:XX:XX:XX:XX Connected: yes
[CHG] Device 44:78:XX:XX:XX:XX Connected: no
[bluetooth]#

Just before attempting the pairing/connection, I ran sudo btmon -wpair.bts to log what goes wrong:


pi@antonio:~ $ sudo btmon -wpair.bts
Bluetooth monitor ver 5.50
= Note: Linux version 5.4.51-v7l+ (armv7l)                                                                          0.230608
= Note: Bluetooth subsystem version 2.22                                                                            0.230614
= New Index: DC:A6:XX:XX:XX:XX (Primary,UART,hci0)                                                           [hci0] 0.230617
= Open Index: DC:A6:XX:XX:XX:XX                                                                              [hci0] 0.230620
= Index Info: DC:A6:XX:XX:XX:XX (Cypress Semiconductor Corporation)                                          [hci0] 0.230624
@ MGMT Open: bluetoothd (privileged) version 1.14                                                          {0x0001} 0.230627
@ MGMT Open: btmon (privileged) version 1.14                                                               {0x0002} 0.230687
> HCI Event: Connect Request (0x04) plen 10                                                              #1 [hci0] 10.509907
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        Class: 0x5a020c
          Major class: Phone (cellular, cordless, payphone, modem)
          Minor class: Smart phone
          Networking (LAN, Ad hoc)
          Capturing (Scanner, Microphone)
          Object Transfer (v-Inbox, v-Folder)
          Telephony (Cordless telephony, Modem, Headset)
        Link type: ACL (0x01)
< HCI Command: Accept Connection Request (0x01|0x0009) plen 7                                            #2 [hci0] 10.510014
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        Role: Master (0x00)
> HCI Event: Command Status (0x0f) plen 4                                                                #3 [hci0] 10.510491
      Accept Connection Request (0x01|0x0009) ncmd 1
        Status: Success (0x00)
> HCI Event: Role Change (0x12) plen 8                                                                   #4 [hci0] 10.734881
        Status: Success (0x00)
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        Role: Master (0x00)
> HCI Event: Connect Complete (0x03) plen 11                                                             #5 [hci0] 10.873856
        Status: Success (0x00)
        Handle: 12
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        Link type: ACL (0x01)
        Encryption: Disabled (0x00)
< HCI Command: Read Remote Supported Features (0x01|0x001b) plen 2                                       #6 [hci0] 10.874111
        Handle: 12
> HCI Event: Command Status (0x0f) plen 4                                                                #7 [hci0] 10.874850
      Read Remote Supported Features (0x01|0x001b) ncmd 1
        Status: Success (0x00)
> HCI Event: Read Remote Supported Features (0x0b) plen 11                                               #8 [hci0] 10.874966
        Status: Success (0x00)
        Handle: 12
        Features: 0xbf 0xfe 0xcf 0xfe 0xdb 0xff 0x7b 0x87
          3 slot packets
          5 slot packets
          Encryption
          Slot offset
          Timing accuracy
          Role switch
          Sniff mode
          Power control requests
          Channel quality driven data rate (CQDDR)
          SCO link
          HV2 packets
          HV3 packets
          u-law log synchronous data
          A-law log synchronous data
          CVSD synchronous data
          Paging parameter negotiation
          Power control
          Transparent synchronous data
          Flow control lag (most significant bit)
          Broadcast Encryption
          Enhanced Data Rate ACL 2 Mbps mode
          Enhanced Data Rate ACL 3 Mbps mode
          Enhanced inquiry scan
          Interlaced inquiry scan
          Interlaced page scan
          RSSI with inquiry results
          Extended SCO link (EV3 packets)
          EV4 packets
          EV5 packets
          AFH capable slave
          AFH classification slave
          LE Supported (Controller)
          3-slot Enhanced Data Rate ACL packets
          5-slot Enhanced Data Rate ACL packets
          Sniff subrating
          Pause encryption
          AFH capable master
          AFH classification master
          Enhanced Data Rate eSCO 2 Mbps mode
          Enhanced Data Rate eSCO 3 Mbps mode
          3-slot Enhanced Data Rate eSCO packets
          Extended Inquiry Response
          Simultaneous LE and BR/EDR (Controller)
          Secure Simple Pairing
          Encapsulated PDU
          Erroneous Data Reporting
          Non-flushable Packet Boundary Flag
          Link Supervision Timeout Changed Event
          Inquiry TX Power Level
          Enhanced Power Control
          Extended features
< HCI Command: Read Remote Extended Features (0x01|0x001c) plen 3                                        #9 [hci0] 10.875035
        Handle: 12
        Page: 1
> HCI Event: Command Status (0x0f) plen 4                                                               #10 [hci0] 10.875634
      Read Remote Extended Features (0x01|0x001c) ncmd 1
        Status: Success (0x00)
> HCI Event: Read Remote Extended Features (0x23) plen 13                                               #11 [hci0] 10.875759
        Status: Success (0x00)
        Handle: 12
        Page: 1/2
        Features: 0x07 0x00 0x00 0x00 0x00 0x00 0x00 0x00
          Secure Simple Pairing (Host Support)
          LE Supported (Host)
          Simultaneous LE and BR/EDR (Host)
< HCI Command: Remote Name Request (0x01|0x0019) plen 10                                                #12 [hci0] 10.875852
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        Page scan repetition mode: R2 (0x02)
        Page scan mode: Mandatory (0x00)
        Clock offset: 0x0000
< ACL Data TX: Handle 12 flags 0x00 dlen 10                                                             #13 [hci0] 10.875882
      L2CAP: Information Request (0x0a) ident 1 len 2
        Type: Extended features supported (0x0002)
> HCI Event: Max Slots Change (0x1b) plen 3                                                             #14 [hci0] 10.876537
        Handle: 12
        Max slots: 5
> HCI Event: Command Status (0x0f) plen 4                                                               #15 [hci0] 10.876641
      Remote Name Request (0x01|0x0019) ncmd 1
        Status: Success (0x00)
> ACL Data RX: Handle 12 flags 0x02 dlen 10                                                             #16 [hci0] 10.883572
      L2CAP: Information Request (0x0a) ident 2 len 2
        Type: Extended features supported (0x0002)
< ACL Data TX: Handle 12 flags 0x00 dlen 16                                                             #17 [hci0] 10.883656
      L2CAP: Information Response (0x0b) ident 2 len 8
        Type: Extended features supported (0x0002)
        Result: Success (0x0000)
        Features: 0x000002b8
          Enhanced Retransmission Mode
          Streaming Mode
          FCS Option
          Fixed Channels
          Unicast Connectionless Data Reception
> HCI Event: Number of Completed Packets (0x13) plen 5                                                  #18 [hci0] 10.886334
        Num handles: 1
        Handle: 12
        Count: 2
> HCI Event: Remote Name Req Complete (0x07) plen 255                                                   #19 [hci0] 10.954611
        Status: Success (0x00)
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        Name: Galaxy A3 (2016)
@ MGMT Event: Device Connected (0x000b) plen 36                                                    {0x0002} [hci0] 10.954674
        BR/EDR Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        Flags: 0x00000000
        Data length: 23
        Name (complete): Galaxy A3 (2016)
        Class: 0x5a020c
          Major class: Phone (cellular, cordless, payphone, modem)
          Minor class: Smart phone
          Networking (LAN, Ad hoc)
          Capturing (Scanner, Microphone)
          Object Transfer (v-Inbox, v-Folder)
          Telephony (Cordless telephony, Modem, Headset)
@ MGMT Event: Device Connected (0x000b) plen 36                                                    {0x0001} [hci0] 10.954674
        BR/EDR Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        Flags: 0x00000000
        Data length: 23
        Name (complete): Galaxy A3 (2016)
        Class: 0x5a020c
          Major class: Phone (cellular, cordless, payphone, modem)
          Minor class: Smart phone
          Networking (LAN, Ad hoc)
          Capturing (Scanner, Microphone)
          Object Transfer (v-Inbox, v-Folder)
          Telephony (Cordless telephony, Modem, Headset)
> HCI Event: IO Capability Response (0x32) plen 9                                                       #20 [hci0] 10.955098
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        IO capability: DisplayYesNo (0x01)
        OOB data: Authentication data not present (0x00)
        Authentication: Dedicated Bonding - MITM required (0x03)
> HCI Event: IO Capability Request (0x31) plen 6                                                        #21 [hci0] 10.955108
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
< HCI Command: IO Capability Request Reply (0x01|0x002b) plen 9                                         #22 [hci0] 10.955228
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        IO capability: NoInputNoOutput (0x03)
        OOB data: Authentication data not present (0x00)
        Authentication: Dedicated Bonding - MITM not required (0x02)
> HCI Event: Command Complete (0x0e) plen 10                                                            #23 [hci0] 10.955996
      IO Capability Request Reply (0x01|0x002b) ncmd 1
        Status: Success (0x00)
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
> ACL Data RX: Handle 12 flags 0x02 dlen 16                                                             #24 [hci0] 11.046034
      L2CAP: Information Response (0x0b) ident 1 len 8
        Type: Extended features supported (0x0002)
        Result: Success (0x0000)
        Features: 0x000000b8
          Enhanced Retransmission Mode
          Streaming Mode
          FCS Option
          Fixed Channels
< ACL Data TX: Handle 12 flags 0x00 dlen 10                                                             #25 [hci0] 11.046080
      L2CAP: Information Request (0x0a) ident 2 len 2
        Type: Fixed channels supported (0x0003)
> ACL Data RX: Handle 12 flags 0x02 dlen 10                                                             #26 [hci0] 11.047280
      L2CAP: Information Request (0x0a) ident 3 len 2
        Type: Fixed channels supported (0x0003)
< ACL Data TX: Handle 12 flags 0x00 dlen 20                                                             #27 [hci0] 11.047309
      L2CAP: Information Response (0x0b) ident 3 len 12
        Type: Fixed channels supported (0x0003)
        Result: Success (0x0000)
        Channels: 0x0000000000000086
          L2CAP Signaling (BR/EDR)
          Connectionless reception
          Security Manager (BR/EDR)
> HCI Event: Number of Completed Packets (0x13) plen 5                                                  #28 [hci0] 11.049905
        Num handles: 1
        Handle: 12
        Count: 2
> ACL Data RX: Handle 12 flags 0x02 dlen 20                                                             #29 [hci0] 11.051046
      L2CAP: Information Response (0x0b) ident 2 len 12
        Type: Fixed channels supported (0x0003)
        Result: Success (0x0000)
        Channels: 0x0000000000000082
          L2CAP Signaling (BR/EDR)
          Security Manager (BR/EDR)
> HCI Event: User Confirmation Request (0x33) plen 10                                                   #30 [hci0] 11.204147
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        Passkey: 506401
< HCI Command: User Confirmation Request Reply (0x01|0x002c) plen 6                                     #31 [hci0] 11.204176
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
> HCI Event: Command Complete (0x0e) plen 10                                                            #32 [hci0] 11.214492
      User Confirmation Request Reply (0x01|0x002c) ncmd 1
        Status: Success (0x00)
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
> HCI Event: Simple Pairing Complete (0x36) plen 7                                                      #33 [hci0] 11.248482
        Status: Success (0x00)
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
> HCI Event: Link Key Notification (0x18) plen 23                                                       #34 [hci0] 11.256332
        Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        Link key: 2fbd9de9fe06e1ed7f572ed1f8651c2a
        Key type: Unauthenticated Combination key from P-192 (0x04)
@ MGMT Event: New Link Key (0x0009) plen 26                                                        {0x0002} [hci0] 11.256355
        Store hint: Yes (0x01)
        BR/EDR Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        Key type: Unauthenticated Combination key from P-192 (0x04)
        Link key: 2fbd9de9fe06e1ed7f572ed1f8651c2a
        PIN length: 0
@ MGMT Event: New Link Key (0x0009) plen 26                                                        {0x0001} [hci0] 11.256355
        Store hint: Yes (0x01)
        BR/EDR Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        Key type: Unauthenticated Combination key from P-192 (0x04)
        Link key: 2fbd9de9fe06e1ed7f572ed1f8651c2a
        PIN length: 0
> ACL Data RX: Handle 12 flags 0x02 dlen 12                                                             #35 [hci0] 11.296012
      L2CAP: Connection Request (0x02) ident 4 len 4
        PSM: 1 (0x0001)
        Source CID: 76
< ACL Data TX: Handle 12 flags 0x00 dlen 16                                                             #36 [hci0] 11.296073
      L2CAP: Connection Response (0x03) ident 4 len 8
        Destination CID: 64
        Source CID: 76
        Result: Connection successful (0x0000)
        Status: No further information available (0x0000)
< ACL Data TX: Handle 12 flags 0x00 dlen 23                                                             #37 [hci0] 11.296084
      L2CAP: Configure Request (0x04) ident 3 len 15
        Destination CID: 76
        Flags: 0x0000
        Option: Retransmission and Flow Control (0x04) [mandatory]
          Mode: Basic (0x00)
          TX window size: 0
          Max transmit: 0
          Retransmission timeout: 0
          Monitor timeout: 0
          Maximum PDU size: 0
> HCI Event: Number of Completed Packets (0x13) plen 5                                                  #38 [hci0] 11.299902
        Num handles: 1
        Handle: 12
        Count: 2
> ACL Data RX: Handle 12 flags 0x02 dlen 16                                                             #39 [hci0] 11.301039
      L2CAP: Configure Request (0x04) ident 5 len 8
        Destination CID: 64
        Flags: 0x0000
        Option: Maximum Transmission Unit (0x01) [mandatory]
          MTU: 672
< ACL Data TX: Handle 12 flags 0x00 dlen 18                                                             #40 [hci0] 11.301070
      L2CAP: Configure Response (0x05) ident 5 len 10
        Source CID: 76
        Flags: 0x0000
        Result: Success (0x0000)
        Option: Maximum Transmission Unit (0x01) [mandatory]
          MTU: 672
> ACL Data RX: Handle 12 flags 0x02 dlen 14                                                             #41 [hci0] 11.302296
      L2CAP: Configure Response (0x05) ident 3 len 6
        Source CID: 64
        Flags: 0x0000
        Result: Success (0x0000)
> ACL Data RX: Handle 12 flags 0x02 dlen 24                                                             #42 [hci0] 11.307331
      Channel: 64 len 20 [PSM 1 mode 0] {chan 0}
      SDP: Service Search Attribute Request (0x06) tid 0 len 15
        Search pattern: [len 5]
          Sequence (6) with 3 bytes [8 extra bits] len 5
            UUID (3) with 2 bytes [0 extra bits] len 3
              PnP Information (0x1200)
        Max record count: 656
        Attribute list: [len 7]
          Sequence (6) with 5 bytes [8 extra bits] len 7
            Unsigned Integer (1) with 4 bytes [0 extra bits] len 5
              0x0000ffff
        Continuation state: 0
< ACL Data TX: Handle 12 flags 0x00 dlen 88                                                             #43 [hci0] 11.307546
      Channel: 76 len 84 [PSM 1 mode 0] {chan 0}
      SDP: Service Search Attribute Response (0x07) tid 0 len 79
        Attribute bytes: 76
          Attribute list: [len 72] {position 0}
            Attribute: Service Record Handle (0x0000) [len 2]
              0x00010000
            Attribute: Service Class ID List (0x0001) [len 2]
              UUID (3) with 2 bytes [0 extra bits] len 3
                PnP Information (0x1200)
            Attribute: Browse Group List (0x0005) [len 2]
              UUID (3) with 2 bytes [0 extra bits] len 3
                Public Browse Root (0x1002)
            Attribute: Bluetooth Profile Descriptor List (0x0009) [len 2]
              Sequence (6) with 6 bytes [8 extra bits] len 8
                UUID (3) with 2 bytes [0 extra bits] len 3
                  PnP Information (0x1200)
                Unsigned Integer (1) with 2 bytes [0 extra bits] len 3
                  0x0103
            Attribute: Unknown (0x0200) [len 2]
              0x0103
            Attribute: Unknown (0x0201) [len 2]
              0x1d6b
            Attribute: Unknown (0x0202) [len 2]
              0x0246
            Attribute: Unknown (0x0203) [len 2]
              0x0532
            Attribute: Unknown (0x0204) [len 2]
              true
            Attribute: Unknown (0x0205) [len 2]
              0x0002
        Continuation state: 0
> HCI Event: Number of Completed Packets (0x13) plen 5                                                  #44 [hci0] 11.312403
        Num handles: 1
        Handle: 12
        Count: 2
> ACL Data RX: Handle 12 flags 0x02 dlen 12                                                             #45 [hci0] 11.313524
      L2CAP: Disconnection Request (0x06) ident 6 len 4
        Destination CID: 64
        Source CID: 76
< ACL Data TX: Handle 12 flags 0x00 dlen 12                                                             #46 [hci0] 11.313563
      L2CAP: Disconnection Response (0x07) ident 6 len 4
        Destination CID: 64
        Source CID: 76
> ACL Data RX: Handle 12 flags 0x02 dlen 12                                                             #47 [hci0] 11.318513
      L2CAP: Connection Request (0x02) ident 7 len 4
        PSM: 1 (0x0001)
        Source CID: 77
< ACL Data TX: Handle 12 flags 0x00 dlen 16                                                             #48 [hci0] 11.318561
      L2CAP: Connection Response (0x03) ident 7 len 8
        Destination CID: 64
        Source CID: 77
        Result: Connection successful (0x0000)
        Status: No further information available (0x0000)
< ACL Data TX: Handle 12 flags 0x00 dlen 23                                                             #49 [hci0] 11.318570
      L2CAP: Configure Request (0x04) ident 4 len 15
        Destination CID: 77
        Flags: 0x0000
        Option: Retransmission and Flow Control (0x04) [mandatory]
          Mode: Basic (0x00)
          TX window size: 0
          Max transmit: 0
          Retransmission timeout: 0
          Monitor timeout: 0
          Maximum PDU size: 0
> HCI Event: Number of Completed Packets (0x13) plen 5                                                  #50 [hci0] 11.346120
        Num handles: 1
        Handle: 12
        Count: 2
> ACL Data RX: Handle 12 flags 0x02 dlen 16                                                             #51 [hci0] 11.348540
      L2CAP: Configure Request (0x04) ident 8 len 8
        Destination CID: 64
        Flags: 0x0000
        Option: Maximum Transmission Unit (0x01) [mandatory]
          MTU: 672
< ACL Data TX: Handle 12 flags 0x00 dlen 18                                                             #52 [hci0] 11.348572
      L2CAP: Configure Response (0x05) ident 8 len 10
        Source CID: 77
        Flags: 0x0000
        Result: Success (0x0000)
        Option: Maximum Transmission Unit (0x01) [mandatory]
          MTU: 672
> ACL Data RX: Handle 12 flags 0x02 dlen 14                                                             #53 [hci0] 11.349798
      L2CAP: Configure Response (0x05) ident 4 len 6
        Source CID: 64
        Flags: 0x0000
        Result: Success (0x0000)
> HCI Event: Number of Completed Packets (0x13) plen 5                                                  #54 [hci0] 11.351143
        Num handles: 1
        Handle: 12
        Count: 2
> ACL Data RX: Handle 12 flags 0x02 dlen 24                                                             #55 [hci0] 11.353575
      Channel: 64 len 20 [PSM 1 mode 0] {chan 0}
      SDP: Service Search Attribute Request (0x06) tid 0 len 15
        Search pattern: [len 5]
          Sequence (6) with 3 bytes [8 extra bits] len 5
            UUID (3) with 2 bytes [0 extra bits] len 3
              L2CAP (0x0100)
        Max record count: 656
        Attribute list: [len 7]
          Sequence (6) with 5 bytes [8 extra bits] len 7
            Unsigned Integer (1) with 4 bytes [0 extra bits] len 5
              0x0000ffff
        Continuation state: 0
< ACL Data TX: Handle 12 flags 0x00 dlen 221                                                            #56 [hci0] 11.353774
      Channel: 77 len 217 [PSM 1 mode 0] {chan 0}
      SDP: Service Search Attribute Response (0x07) tid 0 len 212
        Attribute bytes: 209
          Attribute list: [len 103] {position 0}
            Attribute: Service Record Handle (0x0000) [len 2]
              0x00010001
            Attribute: Service Class ID List (0x0001) [len 2]
              UUID (3) with 2 bytes [0 extra bits] len 3
                A/V Remote Control (0x110e)
              UUID (3) with 2 bytes [0 extra bits] len 3
                A/V Remote Control Controller (0x110f)
            Attribute: Protocol Descriptor List (0x0004) [len 2]
              Sequence (6) with 6 bytes [8 extra bits] len 8
                UUID (3) with 2 bytes [0 extra bits] len 3
                  L2CAP (0x0100)
                Unsigned Integer (1) with 2 bytes [0 extra bits] len 3
                  0x0017
              Sequence (6) with 6 bytes [8 extra bits] len 8
                UUID (3) with 2 bytes [0 extra bits] len 3
                  AVCTP (0x0017)
                Unsigned Integer (1) with 2 bytes [0 extra bits] len 3
                  0x0103
            Attribute: Browse Group List (0x0005) [len 2]
              UUID (3) with 2 bytes [0 extra bits] len 3
                Public Browse Root (0x1002)
            Attribute: Bluetooth Profile Descriptor List (0x0009) [len 2]
              Sequence (6) with 6 bytes [8 extra bits] len 8
                UUID (3) with 2 bytes [0 extra bits] len 3
                  A/V Remote Control (0x110e)
                Unsigned Integer (1) with 2 bytes [0 extra bits] len 3
                  0x0106
            Attribute: Additional Protocol Descriptor List (0x000d) [len 2]
              Sequence (6) with 16 bytes [8 extra bits] len 18
                Sequence (6) with 6 bytes [8 extra bits] len 8
                  UUID (3) with 2 bytes [0 extra bits] len 3
                    L2CAP (0x0100)
                  Unsigned Integer (1) with 2 bytes [0 extra bits] len 3
                    0x001b
                Sequence (6) with 6 bytes [8 extra bits] len 8
                  UUID (3) with 2 bytes [0 extra bits] len 3
                    AVCTP (0x0017)
                  Unsigned Integer (1) with 2 bytes [0 extra bits] len 3
                    0x0103
            Attribute: Unknown (0x0100) [len 2]
              AVRCP CT [len 8]
            Attribute: Unknown (0x0311) [len 2]
              0x004f
          Attribute list: [len 100] {position 1}
            Attribute: Service Record Handle (0x0000) [len 2]
              0x00010002
            Attribute: Service Class ID List (0x0001) [len 2]
              UUID (3) with 2 bytes [0 extra bits] len 3
                A/V Remote Control Target (0x110c)
            Attribute: Protocol Descriptor List (0x0004) [len 2]
              Sequence (6) with 6 bytes [8 extra bits] len 8
                UUID (3) with 2 bytes [0 extra bits] len 3
                  L2CAP (0x0100)
                Unsigned Integer (1) with 2 bytes [0 extra bits] len 3
                  0x0017
              Sequence (6) with 6 bytes [8 extra bits] len 8
                UUID (3) with 2 bytes [0 extra bits] len 3
                  AVCTP (0x0017)
                Unsigned Integer (1) with 2 bytes [0 extra bits] len 3
                  0x0103
            Attribute: Browse Group List (0x0005) [len 2]
              UUID (3) with 2 bytes [0 extra bits] len 3
                Public Browse Root (0x1002)
            Attribute: Bluetooth Profile Descriptor List (0x0009) [len 2]
              Sequence (6) with 6 bytes [8 extra bits] len 8
                UUID (3) with 2 bytes [0 extra bits] len 3
                  A/V Remote Control (0x110e)
                Unsigned Integer (1) with 2 bytes [0 extra bits] len 3
                  0x0105
            Attribute: Additional Protocol Descriptor List (0x000d) [len 2]
              Sequence (6) with 16 bytes [8 extra bits] len 18
                Sequence (6) with 6 bytes [8 extra bits] len 8
                  UUID (3) with 2 bytes [0 extra bits] len 3
                    L2CAP (0x0100)
                  Unsigned Integer (1) with 2 bytes [0 extra bits] len 3
                    0x001b
                Sequence (6) with 6 bytes [8 extra bits] len 8
                  UUID (3) with 2 bytes [0 extra bits] len 3
                    AVCTP (0x0017)
                  Unsigned Integer (1) with 2 bytes [0 extra bits] len 3
                    0x0103
            Attribute: Unknown (0x0100) [len 2]
              AVRCP TG [len 8]
            Attribute: Unknown (0x0311) [len 2]
              0x005f
        Continuation state: 0
> ACL Data RX: Handle 12 flags 0x02 dlen 12                                                             #57 [hci0] 11.361025
      L2CAP: Disconnection Request (0x06) ident 9 len 4
        Destination CID: 64
        Source CID: 77
< ACL Data TX: Handle 12 flags 0x00 dlen 12                                                             #58 [hci0] 11.361068
      L2CAP: Disconnection Response (0x07) ident 9 len 4
        Destination CID: 64
        Source CID: 77
> HCI Event: Number of Completed Packets (0x13) plen 5                                                  #59 [hci0] 11.363663
        Num handles: 1
        Handle: 12
        Count: 2
< HCI Command: Disconnect (0x01|0x0006) plen 3                                                          #60 [hci0] 15.428297
        Handle: 12
        Reason: Remote User Terminated Connection (0x13)
> HCI Event: Command Status (0x0f) plen 4                                                               #61 [hci0] 15.428648
      Disconnect (0x01|0x0006) ncmd 1
        Status: Success (0x00)
> HCI Event: Disconnect Complete (0x05) plen 4                                                          #62 [hci0] 15.527355
        Status: Success (0x00)
        Handle: 12
        Reason: Connection Terminated By Local Host (0x16)
@ MGMT Event: Device Disconnected (0x000c) plen 8                                                  {0x0002} [hci0] 15.527405
        BR/EDR Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        Reason: Connection terminated by local host (0x02)
@ MGMT Event: Device Disconnected (0x000c) plen 8                                                  {0x0001} [hci0] 15.527405
        BR/EDR Address: 44:78:XX:XX:XX:XX (Samsung Electronics Co.,Ltd)
        Reason: Connection terminated by local host (0x02)

Let me know if someone has any ideas.
Thanks!
Mark