Adding Andy, Marcel, Johan to CC
Op 16-02-19 om 18:38 schreef Ferry Toth:
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?
Actually, this is using Andy's kernel 4.20 (not 4.19).
I didn't mention that other BT functionality seems to be working fine.
And building with Yocto Thud (bluez 5.50).
Everything is fairly up-to-date (compared to Edison factory image).
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)
Note the KERNEL already issues a remove before UDEV add
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?
