I'm trying to make a connection from my Edison (linux 4.19) to my android
phone (nap), but it seems Edison bnep0 gets removed immediately after
creation. How can help me diagnose this?
Initially I tried connman. The bluetooth service appears, but when I try to
connect I get:
connmanctl> connect bluetooth_43341B001FAC_C462EA01AF74
Error /net/connman/service/bluetooth_43341B001FAC_C462EA01AF74:
Input/output error
For testing I switched to the bluez test-network.py script:
root@edison:~# python3 ./test-network.py C4:62:EA:01:AF:74 nap
Traceback (most recent call last):
File "./test-network.py", line 42, in <module>
iface = network.Connect(service)
File "/usr/lib/python3.5/site-packages/dbus/proxies.py", line 70, in
__call__
return self._proxy_method(*args, **keywords)
File "/usr/lib/python3.5/site-packages/dbus/proxies.py", line 145, in
__call__
**keywords)
File "/usr/lib/python3.5/site-packages/dbus/connection.py", line 651, in
call_blocking
message, timeout)
dbus.exceptions.DBusException: org.bluez.Error.Failed: Input/output error
Using btmon to log while running above script:
< ACL Data TX: Handle 12 flags 0x00 dlen 11
#96 [hci0] 2974.047858
Channel: 78 len 7 [PSM 15 mode 0] {chan 0}
BNEP: Control (0x01|0)
Setup Conn Req (0x01)
Size: 0x02
Dst: 0x1116(NAP)
Src: 0x1115(PANU)
HCI Event: Number of Completed Packets (0x13) plen 5
#97 [hci0] 2974.049982
Num handles: 1
Handle: 12
Count: 2
ACL Data RX: Handle 12 flags 0x02 dlen 8
#98 [hci0] 2974.052464
Channel: 64 len 4 [PSM 15 mode 0] {chan 0}
BNEP: Control (0x01|0)
Setup Conn Rsp (0x02)
Rsp msg: Operation Successful(0x0000)
= bluetoothd: bnep: Could not bring up bnep0: Cannot assign requested
address(99)
= bluetoothd: connect failed Input/output error
And logging with udevadm monitor:
KERNEL add /devices/pci..../serial0-0/bluetooth/hci0/hci0:12 (bluetooth)
UDEV add /devices/pci..../serial0-0/bluetooth/hci0/hci0:12 (bluetooth)
KERNEL add /devices/pci..../serial0-0/bluetooth/hci0/hci0:12/net/bnep0 (net)
KERNEL add
/devices/pci..../serial0-0/bluetooth/hci0/hci0:12/net/bnep0/queues/rx-0
(queues)
KERNEL add
/devices/pci..../serial0-0/bluetooth/hci0/hci0:12/net/bnep0/queues/tx-0
(queues)
KERNEL remove
/devices/pci..../serial0-0/bluetooth/hci0/hci0:12/net/bnep0/queues/rx-0
(queues)
KERNEL[146116.687930] remove
/devices/pci..../serial0-0/bluetooth/hci0/hci0:12/net/bnep0/queues/tx-0
(queues)
KERNEL remove /devices/pci..../serial0-0/bluetooth/hci0/hci0:12/net/bnep0
(net)
UDEV add /devices/pci..../serial0-0/bluetooth/hci0/hci0:12/net/bnep0
(net)
UDEV add
/devices/pci..../serial0-0/bluetooth/hci0/hci0:12/net/bnep0/queues/rx-0
(queues)
UDEV add
/devices/pci..../serial0-0/bluetooth/hci0/hci0:12/net/bnep0/queues/tx-0
(queues)
UDEV remove
/devices/pci..../serial0-0/bluetooth/hci0/hci0:12/net/bnep0/queues/rx-0
(queues)
UDEV [146116.776687] remove
/devices/pci..../serial0-0/bluetooth/hci0/hci0:12/net/bnep0/queues/tx-0
(queues)
UDEV remove /devices/pci..../serial0-0/bluetooth/hci0/hci0:12/net/bnep0
(net)
KERNEL remove /devices/pci..../serial0-0/bluetooth/hci0/hci0:12
(bluetooth)
UDEV remove /devices/pci..../serial0-0/bluetooth/hci0/hci0:12
(bluetooth)
To me it looks like the kernel already removes the bnep0 device, before user
space can bring it up.
And indeed, doing the same from another computer (Ubuntu linux 4.18) I get
only the kernel and udev add events, the connection is established and the
remove events appear only after pressing Ctrl-C
What could this be?
