用脏办法解决 BLE 鼠标重连后指针不动的问题

我的蓝牙鼠标（雷柏 MT750）使用 BLE（Bluetooth Low Energy）连接笔记本时，时常遇到自动重连后电脑这边认为已连接，而鼠标那边灯自动灭掉，鼠标指针无反应的问题。在网上反复搜索 bluez 相关问题找到了许多类似问题，鼠标类型也集中在罗技、ThinkPad 等 BLE 鼠标上。

偶然间发现每次重连后，如果手动用 bluetoothctl 发一个 “pair” 指令（会超时失败），就能令鼠标正常连接。给 bluez 报了一个 bug 后，我写了下面的简单脚本先绕过问题：

#!/usr/bin/python

import dbus
import dbus.mainloop.glib
from gi.repository import GLib

adapter = "hci0"
device = "xx:xx:xx:xx:xx:xx"
device_path = '/org/bluez/' + adapter + "/dev_" + device.replace(":", "_")

dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
system_bus = dbus.SystemBus()
device_object = system_bus.get_object('org.bluez', device_path)
device_interface = dbus.Interface(device_object, 'org.bluez.Device1')

def device_info(_arg0, event, _arg2):
    if event.get("Connected"):
        print("Mouse connected, attempt to pair...")
        try:
            device_interface.Pair()
        except dbus.exceptions.DBusException:
            pass

system_bus.add_signal_receiver(
    device_info,
    dbus_interface='org.freedesktop.DBus.Properties',
    signal_name="PropertiesChanged",
    arg0='org.bluez.Device1')

GLib.MainLoop().run()

#!/usr/bin/python

import dbus

import dbus.mainloop.glib

from gi.repository import GLib

adapter = "hci0"

device = "xx:xx:xx:xx:xx:xx"

device_path = '/org/bluez/' + adapter + "/dev_" + device.replace(":", "_")

dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)

system_bus = dbus.SystemBus()

device_object = system_bus.get_object('org.bluez', device_path)

device_interface = dbus.Interface(device_object, 'org.bluez.Device1')

def device_info(_arg0, event, _arg2):

if event.get("Connected"):

print("Mouse connected, attempt to pair...")

try:

device_interface.Pair()

except dbus.exceptions.DBusException:

pass

system_bus.add_signal_receiver(

device_info,

dbus_interface='org.freedesktop.DBus.Properties',

signal_name="PropertiesChanged",

arg0='org.bluez.Device1')

GLib.MainLoop().run()

保持在后台运行即可。我自己测试了一段时间，效果非常好。

PS: bluez 上游 bugzilla 堆满了各种没有回答的错误报告，目测不是那么好修的……

用脏办法解决 BLE 鼠标重连后指针不动的问题

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