[G4 Android Development] alain57:
well in the logs there are several errors

first I saw these kind of exception, i guess they come because I have a paired bluetooth headset and also my car who is paired and currently both devices are not with me in the office ^^ so I don't know if it is normal that they trigger some exceptions

E/BluetoothAvrcpController( 4515): java.lang.IllegalArgumentException: Service not registered: android.bluetooth.BluetoothAvrcpController$2@192facd8

E/BluetoothAvrcpController( 4515):	at android.app.LoadedApk.forgetServiceDispatcher(LoadedApk.java:1030)

E/BluetoothAvrcpController( 4515):	at android.app.ContextImpl.unbindService(ContextImpl.java:1839)

E/BluetoothAvrcpController( 4515):	at android.content.ContextWrapper.unbindService(ContextWrapper.java:557)

E/BluetoothAvrcpController( 4515):	at android.bluetooth.BluetoothAvrcpController$1.onBluetoothStateChange(BluetoothAvrcpController.java:80)

E/BluetoothAvrcpController( 4515):	at android.bluetooth.IBluetoothStateChangeCallback$Stub.onTransact(IBluetoothStateChangeCallback.java:55)

E/BluetoothAvrcpController( 4515):	at android.os.Binder.execTransact(Binder.java:446)

E/BluetoothHeadsetClient( 4515): java.lang.IllegalArgumentException: Service not registered: android.bluetooth.BluetoothHeadsetClient$2@7069831

E/BluetoothHeadsetClient( 4515):	at android.app.LoadedApk.forgetServiceDispatcher(LoadedApk.java:1030)

E/BluetoothHeadsetClient( 4515):	at android.app.ContextImpl.unbindService(ContextImpl.java:1839)

E/BluetoothHeadsetClient( 4515):	at android.content.ContextWrapper.unbindService(ContextWrapper.java:557)

E/BluetoothHeadsetClient( 4515):	at android.bluetooth.BluetoothHeadsetClient$1.onBluetoothStateChange(BluetoothHeadsetClient.java:382)

E/BluetoothHeadsetClient( 4515):	at android.bluetooth.IBluetoothStateChangeCallback$Stub.onTransact(IBluetoothStateChangeCallback.java:55)

E/BluetoothHeadsetClient( 4515):	at android.os.Binder.execTransact(Binder.java:446)

E/BluetoothA2dpSink( 4515): java.lang.IllegalArgumentException: Service not registered: android.bluetooth.BluetoothA2dpSink$2@2713eb16

E/BluetoothA2dpSink( 4515):	at android.app.LoadedApk.forgetServiceDispatcher(LoadedApk.java:1030)

E/BluetoothA2dpSink( 4515):	at android.app.ContextImpl.unbindService(ContextImpl.java:1839)

E/BluetoothA2dpSink( 4515):	at android.content.ContextWrapper.unbindService(ContextWrapper.java:557)

E/BluetoothA2dpSink( 4515):	at android.bluetooth.BluetoothA2dpSink$1.onBluetoothStateChange(BluetoothA2dpSink.java:139)

E/BluetoothA2dpSink( 4515):	at android.bluetooth.IBluetoothStateChangeCallback$Stub.onTransact(IBluetoothStateChangeCallback.java:55)

E/BluetoothA2dpSink( 4515):	at android.os.Binder.execTransact(Binder.java:446)

this one seems to be BLE related

I/bte_conf( 6661): bte_load_conf attempt to load stack conf from /etc/bluetooth/bt_stack.conf

I/bte_conf( 6661): bte_load_ble_conf attempt to load ble stack conf from /etc/bluetooth/ble_stack.conf

E/bt_osi_config( 6661): config_new unable to open file '/etc/bluetooth/ble_stack.conf': No such file or directory

I/bte_conf( 6661): bte_load_ble_conf file >/etc/bluetooth/ble_stack.conf< not found

and of course these that always come when trying to do some BLE scan (even just installing a BLE scanner and running it cause this kind of issues)

W/bt-btif ( 6661): bta_dm_ble_observe BTM_BleObserve failed. status 5