我有一个 Wren V5US 蓝牙扬声器，它与我的 Ubuntu 16.04 LTS 配合得很好。昨天我重启了系统，它不再自动连接了。我觉得我最初设置它时可能做了一些更改（最有可能是使用 pulseaudio）以使其工作，但我记不清了（也可能是在升级到 16.04 之前）。
当我使用蓝牙管理器时，它会显示扬声器一两秒钟，然后消失。这种情况不断重复。我有蓝牙控制运行并不断记录以下几行：
[NEW] Device 00:17:53:73:95:DC V5US14_7395DC
[CHG] Device 00:17:53:73:95:DC Connected: no
[DEL] Device 00:17:53:73:95:DC V5US14_7395DC
我也正在运行 blueman-assistant，它记录了以下消息：
on_device_created (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:253)
created /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
__init__ (/usr/lib/python3/dist-packages/blueman/main/Device.py:26)
caching initial properties
_________
add_device (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:317)
adding new device
_________
do_cache (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:496)
Caching new device 00:17:53:73:95:DC
_________
monitor_power_levels (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:185)
starting monitor
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
on_device_property_changed (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:163)
list: device_prop_ch Connected 0 /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
RemoveDevice (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:427)
<Device.Device object at 0x7fe5053a3438 (blueman+main+Device+Device at 0x17b6740)>
_________
__del__ (/usr/lib/python3/dist-packages/blueman/main/Device.py:72)
deleting device /org/bluez/hci0/dev_00_17_53_73_95_DC
_________
Destroy (/usr/lib/python3/dist-packages/blueman/main/Device.py:94)
invalidating device /org/bluez/hci0/dev_00_17_53_73_95_DC
有很多帖子有类似的问题，但我不确定哪一个适用于我。我不想到处尝试所有方法并弄乱我的设置。
编辑1 您可以找到 pulseaudio这里。