Need help on a bluetooth dongle connection issue

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I setup a Dell T20 with DS3615xs of Jun's loader. I did check the hardware compatibility list. Then I bought a Kinivo BTD-400 Bluetooth dongle because it is in the list. 

When I connect it, it doesn't work. The blue light is up. I did check dmesg and /var/log/messages. I found the firmware is missing. It seems to me the DS3615XS doesn't support it at all. Never mind, I download the firmware and put it in /lib/firmware/brcm folder. Then I found there is maybe a bug for this BT support because when I direct plug the dongle in, the DSM expects BCM20702A0-0a5c-21e8.hcd. But when I reboot, it asks for "BCM920702 Bluetooth 4.0-0a5c-21e8.hcd". It is so upset. Do they really have QE?


Anyway, I put both name in that folder. Then check the log again, it seems like the firmware is loaded successfully. However, the kernel suddently killed it.


2018-12-30T03:06:34-08:00 DiskStation [ 1916.840592] init: bluetoothd main process (26477) killed by KILL signal

2018-12-30T03:07:30-08:00 DiskStation bluetoothd[8747]: Failed to open RFKILL control device

2018-12-30T03:07:31-08:00 DiskStation bluetoothd[8747]: Unknown command complete for opcode 19


There are no further information provided. I don't know what can I do now. Can anybody give some clue? I did check the bluetoothd service, it is disabled. I enabled it manually but it still the same. It doesn't work. There is nothing showing up from control panel -> wireless -> bluetooth. 


I checked hdiconfig -a, it looks good.




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admin@DiskStation:~$ dmesg | grep -i blue

[   16.954370] Bluetooth: Core ver 2.19

[   16.954385] Bluetooth: HCI device and connection manager initialized

[   16.954392] Bluetooth: HCI socket layer initialized

[   16.954393] Bluetooth: L2CAP socket layer initialized

[   16.954397] Bluetooth: SCO socket layer initialized

[   16.956755] Bluetooth: RFCOMM socket layer initialized

[   16.956760] Bluetooth: RFCOMM ver 1.11

[   16.957633] Bluetooth: HIDP (Human Interface Emulation) ver 1.2

[   16.957637] Bluetooth: HIDP socket layer initialized

[   16.977731] Bluetooth: hci0: BCM: patching hci_ver=06 hci_rev=153a lmp_ver=06 lmp_subver=220e

[   17.582244] Bluetooth: hci0: BCM: firmware hci_ver=06 hci_rev=153a lmp_ver=06 lmp_subver=220e

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admin@DiskStation:~$ hciconfig -a

hci0: Type: BR/EDR  Bus: USB

BD Address: 5C:F3:70:92:D5:8F  ACL MTU: 1021:8  SCO MTU: 64:1


RX bytes:37487 acl:0 sco:0 events:612 errors:0

TX bytes:36935 acl:0 sco:0 commands:609 errors:0

Features: 0xbf 0xfe 0xcf 0xfe 0xdb 0xff 0x7b 0x87

Packet type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3 

Link policy: RSWITCH SNIFF 

Link mode: SLAVE ACCEPT 

Name: 'DiskStation-0'

Class: 0x6c0100

Service Classes: Rendering, Capturing, Audio, Telephony

Device Class: Computer, Uncategorized

HCI Version: 4.0 (0x6)  Revision: 0x153a

LMP Version: 4.0 (0x6)  Subversion: 0x220e

Manufacturer: Broadcom Corporation (15)

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sudo cat /var/log/messages | grep -i blue



2018-12-31T02:40:37-08:00 DiskStation [84869.599934] init: bluetoothd main process (23812) killed by KILL signal

2018-12-31T02:41:38-08:00 DiskStation bluetoothd[8765]: Failed to open RFKILL control device

2018-12-31T02:41:39-08:00 DiskStation bluetoothd[8765]: Unknown command complete for opcode 19

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sudo cat /var/log/upstart/bluetoothd.log 



2018-12-31T02:40:32-0800 btacd stoped.

2018-12-31T02:41:38-0800 Mon Dec 31 02:41:38 PST 2018

2018-12-31T02:41:38-0800 start bluetoothd

2018-12-31T02:41:38-0800 going to start btacd

2018-12-31T02:41:38-0800 btacd started.

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