Problems with incoming connection request on Nexus 4

[Florian Grandel <fgrandel@gmail.com>]

Hi Marcel and Szymon,

I'm currently testing my code on my Nexus 4 device. Multi-Advertising 
works nicely but I can't get the device to accept incoming connection 
requests while in peripheral mode. I'm using Nordic's nRF Master Control 
app on my Samsung S4 in the central role for testing.

Here some sample debug output. When launching the connection request I get:

07-29 03:14:36.816  16843-16843/? I/bluetoothd﹕
mgmt_if: > 0b 00 00 00 1e 00 05 46 ab c2 01 94 00 00 00 00
.......F........

07-29 03:14:36.816  16843-16843/? I/bluetoothd﹕
mgmt_if:   00 11 00 0b 09 66 67 2d 73 61 6d 73 75 6e 67 04
.....fg-samsung.

07-29 03:14:36.816  16843-16843/? I/bluetoothd﹕
mgmt_if:   0d 0c 02 5a
...Z

07-29 03:14:36.816  16843-16843/? I/bluetoothd﹕
mgmt_if: [0x0000] event 0x000b

07-29 03:14:36.816  16843-16843/? D/bluetoothd﹕
external/bluetooth/bluez/android/bluetooth.c:mgmt_device_connected_event() 
94:01:C2:AB:46:05 type 0

07-29 03:14:36.829  16817-16875/com.android.bluetooth D/BlueZ﹕ 
external/bluetooth/bluez/android/hal-bluetooth.c:handle_acl_state_changed() 
state 0

07-29 03:14:37.100  16843-16843/? D/bluetoothd﹕ 
external/bluetooth/bluez/android/gatt.c:connect_confirm()

07-29 03:14:37.100  16843-16843/? D/bluetoothd﹕ 
external/bluetooth/bluez/android/gatt.c:device_set_state() gatt: Device 
94:01:C2:AB:46:05 state changed DISCONNECTED -> CONNECT READY


And then after the timeout:

07-29 03:15:07.083  16843-16843/? D/bluetoothd﹕ 
external/bluetooth/bluez/android/gatt.c:connect_cb()

07-29 03:15:07.083  16843-16843/? E/bluetoothd﹕ gatt: connection failed 
HUP or ERR on socket: Connection reset by peer (104)

07-29 03:15:07.083  16843-16843/? D/bluetoothd﹕ 
external/bluetooth/bluez/android/gatt.c:device_set_state() gatt: Device 
94:01:C2:AB:46:05 state changed CONNECT READY -> DISCONNECTED


Symptoms:
- The connection request times out.
- bt_io_accept() is being called but the accept_cb (=connect_cb) only 
gets called when the request times out.
- the device is stuck in the CONNECT READY state and never reaches the 
CONNECTED state


Any ideas how I could analyze/solve that problem? I'm stuck on this for 
many hours already...

Thanks!

Florian