RecentConns 'NoneType‘对象不可迭代

Question

上一次对manjaro的更新，不再允许我出于某种原因启用布卢曼。以下是错误：

   Connection Failed: Traceback (most recent call last):
      File "/usr/lib/python3.4/site-packages/dbus/service.py", line 707, in _message_cb
        retval = candidate_method(self, *args, **keywords)
      File "/usr/lib/python3.4/site-packages/blueman/main/DbusService.py", line 36, in wrapper
        return method(*args[1:], **kwargs)
      File "/usr/lib/python3.4/site-packages/blueman/plugins/applet/DBusService.py", line 76, in connect_service
        self.Applet.Plugins.RecentConns.notify(service)
      File "/usr/lib/python3.4/site-packages/blueman/plugins/applet/RecentConns.py", line 261, in notify
        for i in RecentConns.items:
    TypeError: 'NoneType' object is not iterable

blueman-applet给出

blueman-applet:1811): Gtk-WARNING **: Theme parsing error: gtk-widgets.css:2:19: Theming engine 'adwaita' not found
blueman-applet version 2.0 starting
Stale PID, overwriting
/usr/lib/python3.4/site-packages/gi/overrides/__init__.py:313: Warning: The property GSettings:schema is deprecated and shouldn't be used anymore. It will be removed in a future version.
  return super_init_func(self, **new_kwargs)
_________
Load (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:60)
['NMDUNSupport', 'PowerManager', 'DhcpClient', 'AppIndicator', 'ExitItem', 'TransferService', 'GameControllerWakelock', 'Menu', 'PPPSupport', 'ShowConnected', 'Networking', 'StandardItems', 'AuthAgent', 'DBusService', 'SerialManager', 'KillSwitch', 'DiscvManager', 'NMPANSupport', 'StatusIcon', 'RecentConns', 'Headset', 'NetUsage'] 
_________
Load (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:60)
Unable to load plugin module AppIndicator
cannot import name AppIndicator3, introspection typelib not found 
_________
get_interface_version (/usr/lib/python3.4/site-packages/blueman/bluez/BlueZInterface.py:13)
Detected BlueZ 5 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.Headset.Headset'> 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.TransferService.TransferService'> 
_________
get_interface_version (/usr/lib/python3.4/site-packages/blueman/bluez/obex/Base.py:20)
Detected BlueZ integrated obexd 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.StatusIcon.StatusIcon'> 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.Menu.Menu'> 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.ExitItem.ExitItem'> 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.StandardItems.StandardItems'> 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.Networking.Networking'> 
_________
load_nap_settings (/usr/lib/python3.4/site-packages/blueman/plugins/applet/Networking.py:36)
Loading NAP settings 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.AuthAgent.AuthAgent'> 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
Not loading DhcpClient because it's conflict has higher priority 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.DiscvManager.DiscvManager'> 
_________
update_menuitems (/usr/lib/python3.4/site-packages/blueman/plugins/applet/DiscvManager.py:123)
warning: Adapter is None 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.RecentConns.RecentConns'> 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.PowerManager.PowerManager'> 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.ShowConnected.ShowConnected'> 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.GameControllerWakelock.GameControllerWakelock'> 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.DBusService.DBusService'> 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
Not loading PPPSupport because it's conflict has higher priority 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.NMDUNSupport.NMDUNSupport'> 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.SerialManager.SerialManager'> 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.NMPANSupport.NMPANSupport'> 
_________
__load_plugin (/usr/lib/python3.4/site-packages/blueman/main/PluginManager.py:133)
loading <class 'blueman.plugins.applet.KillSwitch.KillSwitch'> 
_________
io_event (/usr/lib/python3.4/site-packages/blueman/plugins/applet/KillSwitch.py:72)
killswitch registered 1 
_________
io_event (/usr/lib/python3.4/site-packages/blueman/plugins/applet/KillSwitch.py:72)
State: False 
_________
UpdatePowerState (/usr/lib/python3.4/site-packages/blueman/plugins/applet/PowerManager.py:159)
off True 
foff False 
on True 
current state True 
new state False 
_________
UpdatePowerState (/usr/lib/python3.4/site-packages/blueman/plugins/applet/PowerManager.py:159)
Signalling False 
_________
_on_obex_owner_changed (/usr/lib/python3.4/site-packages/blueman/plugins/applet/TransferService.py:170)
obex owner changed: :1.45 
_________
on_dbus_name_owner_change (/usr/bin/blueman-applet:94)
org.bluez owner changed to :1.2 
_________
set_nap (/usr/lib/python3.4/site-packages/blueman/plugins/applet/Networking.py:65)
set nap False 
_________
register_agent (/usr/lib/python3.4/site-packages/blueman/plugins/applet/AuthAgent.py:63)
Registering agent 
_________
enumerate_connections (/usr/lib/python3.4/site-packages/blueman/plugins/applet/ShowConnected.py:50)
Found 0 existing connections 
_________
on_registered (/usr/lib/python3.4/site-packages/blueman/bluez/obex/AgentManager.py:18)
/org/blueman/obex_agent 
_________
RequestPowerState (/usr/lib/python3.4/site-packages/blueman/plugins/applet/PowerManager.py:131)
Requesting True 
_________
on_power_state_change_requested (/usr/lib/python3.4/site-packages/blueman/plugins/applet/KillSwitch.py:119)
True 
_________
UpdatePowerState (/usr/lib/python3.4/site-packages/blueman/plugins/applet/PowerManager.py:159)
off True 
foff False 
on False 
current state False 
new state False 
_________
check (/usr/lib/python3.4/site-packages/blueman/plugins/applet/PowerManager.py:119)
callbacks done 
_________
set_adapter_state (/usr/lib/python3.4/site-packages/blueman/plugins/applet/PowerManager.py:90)
True 
_________
set_adapter_state (/usr/lib/python3.4/site-packages/blueman/plugins/applet/PowerManager.py:90)
Exception occurred org.bluez.Error.Blocked: Blocked through rfkill 

gnome-主题-标准安装。

他们把我的罚单贴在github上，我想我永远也不会收到答案，必须等到下一次布瑞曼发行版才能修好。我等不了那么久了，还有别的蓝牙小程序可用于xfce吗？

Answer 1

我跑了

sudo rfkill unblock bluetooth

这似乎是可行的，但是在github上，Christopher重新打开了我的罚单，仍然标记为bug，也许他正在调查一个我不知道的bug，也许是GTK错误。对我来说，我只关心它的作用。

编辑

Christopher发现了一个实际的错误，查看blueman/plugins/mechanism/RfKill.py并根据此更改您的文件，或者等待更新被推送。第15行应该看起来像

f = open('/dev/rfkill', 'wb')只需添加b

Answer 2

Lynob回答的小更新:我遇到了同样的问题，并且发现blueman-applet (至少在1.99版本中)有相同的错误，但问题代码位于/usr/lib/python2.7/dist-packages/blueman/main/KillSwitchNG.py中。

第87-88行：

标志|= os.O_NONBLOCK self.fd = os.open("/dev/rfkill"，标志) .

要解决这个问题，还必须在binary mode调用之前添加此行，从而在flags中设置open(...)位：

旗标|= os.O_BINARY