usb - bluetooth error: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.UnknownObject: - Ask Ubuntu


using ubuntu 16.04 after accidentally removing bluetooth headset device bluetooth manager device list either no longer visible in bluetooth search, or shows few seconds in device list during search , disappears. i'm unable use bluetooth headset.

if run blueman-applet terminal see exception during search followed device getting deleted. 

>__init__ (/usr/lib/python3/dist-packages/blueman/main/device.py:26) caching initial properties  error:dbus.connection:exception in handler d-bus signal: traceback (most recent call last):   file "/usr/lib/python3/dist-packages/dbus/connection.py", line 230, in maybe_handle_message     self._handler(*args, **kwargs)   file "/usr/lib/python3/dist-packages/blueman/bluez/propertiesbluezinterface.py", line 55, in wrapper     handler(name, value, **kwargs)   file "/usr/lib/python3/dist-packages/blueman/plugins/applet/gamecontrollerwakelock.py", line 36, in on_device_property_changed     klass = device(path).get_properties()["class"] & 0x1fff   file "/usr/lib/python3/dist-packages/blueman/main/device.py", line 47, in __init__     self.properties = self.device.get_properties()   file "/usr/lib/python3/dist-packages/blueman/bluez/errors.py", line 148, in warp     raise parse_dbus_error(exception)   file "/usr/lib/python3/dist-packages/blueman/bluez/errors.py", line 146, in warp     return func(*args, **kwargs)   file "/usr/lib/python3/dist-packages/blueman/bluez/propertiesbluezinterface.py", line 34, in get_properties     return self.__properties_interface.getall(self.get_interface_name())   file "/usr/lib/python3/dist-packages/dbus/proxies.py", line 70, in __call__     return self._proxy_method(*args, **keywords)   file "/usr/lib/python3/dist-packages/dbus/proxies.py", line 145, in __call__     **keywords)   file "/usr/lib/python3/dist-packages/dbus/connection.py", line 651, in call_blocking     message, timeout) dbus.exceptions.dbusexception: org.freedesktop.dbus.error.unknownobject: method "getall" signature "s" on interface "org.freedesktop.dbus.properties" doesn't exist

help appreciated - kindof important work.

relevant error:

dbus.exceptions.dbusexception: org.freedesktop.dbus.error.unknownobject: method "getall" signature "s" on interface "org.freedesktop.dbus.properties" doesn't exist


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