Cfrgtkky

I use LXQT in Lubuntu 18.10 and I have a problem with keeping the Bluetooth-speaker connected to the laptop after logging out and in. It works fine after reboot though.

So, I have a solution that always works: rebooting - OR: reinstalling bluez:

sudo apt-get install --reinstall bluez

and that always works!

In any case, when my problem happens, the bluetooth is never blocked.

If I reboot or reinstall bluez there is no need to remove and add again the device, setting it to "Audio sink" is enough.

When this happens, after logging out and in:

• The speaker is listed by blueman-manager, setting to 'Audio Sink' brings the error Protocol Not available.

In terminal:

~$ blueman-manager

_________

Load (/usr/lib/python3/dist-packages/blueman/main/PluginManager.py:60)

['PulseAudioProfile', 'Services'] 

_________

__load_plugin (/usr/lib/python3/dist-packages/blueman/main/PluginManager.py:133)

loading <class 'blueman.plugins.manager.PulseAudioProfile.PulseAudioProfile'> 

_________

pa_context_event (/usr/lib/python3/dist-packages/blueman/main/PulseAudioUtils.py:341)

1 

_________

__load_plugin (/usr/lib/python3/dist-packages/blueman/main/PluginManager.py:133)

loading <class 'blueman.plugins.manager.Services.Services'> 

blueman-manager version 2.0.5 starting

Stale PID, overwriting

_________

pa_context_event (/usr/lib/python3/dist-packages/blueman/main/PulseAudioUtils.py:341)

2 

_________

on_bluez_name_owner_changed (/usr/bin/blueman-manager:96)

org.bluez owner changed to  :1.238 

_________

get_interface_version (/usr/lib/python3/dist-packages/blueman/bluez/BlueZInterface.py:13)

Detected BlueZ 5 

_________

SetAdapter (/usr/lib/python3/dist-packages/blueman/gui/DeviceList.py:271)



_________

on_adapter_changed (/usr/lib/python3/dist-packages/blueman/gui/manager/ManagerToolbar.py:83)

toolbar adapter /org/bluez/hci0 

_________

__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 C0:28:8D:81:64:5A 

_________

row_update_event (/usr/lib/python3/dist-packages/blueman/gui/manager/ManagerDeviceList.py:264)

row update event Fake False 

_________

row_update_event (/usr/lib/python3/dist-packages/blueman/gui/manager/ManagerDeviceList.py:264)

row update event Trusted 0 

_________

row_update_event (/usr/lib/python3/dist-packages/blueman/gui/manager/ManagerDeviceList.py:264)

row update event Paired 1 

_________

Generate (/usr/lib/python3/dist-packages/blueman/gui/manager/ManagerDeviceMenu.py:173)

UE BOOM 2 

_________

pa_context_event (/usr/lib/python3/dist-packages/blueman/main/PulseAudioUtils.py:341)

3 

_________

pa_context_event (/usr/lib/python3/dist-packages/blueman/main/PulseAudioUtils.py:341)

4 

_________

on_pa_ready (/usr/lib/python3/dist-packages/blueman/plugins/manager/PulseAudioProfile.py:29)

connected 

_________

<lambda> (/usr/lib/python3/dist-packages/blueman/main/PulseAudioUtils.py:353)

1 

_________

Generate (/usr/lib/python3/dist-packages/blueman/gui/manager/ManagerDeviceMenu.py:173)

UE BOOM 2 

_________

Generate (/usr/lib/python3/dist-packages/blueman/gui/manager/ManagerDeviceMenu.py:173)

UE BOOM 2 

_________

set_op (/usr/lib/python3/dist-packages/blueman/gui/manager/ManagerDeviceMenu.py:85)

op: regenerating instance <ManagerDeviceMenu.ManagerDeviceMenu object at 0x7f8fd0e05e10 (blueman+gui+manager+ManagerDeviceMenu+ManagerDeviceMenu at 0x1efcb60)> 

_________

set_op (/usr/lib/python3/dist-packages/blueman/gui/manager/ManagerDeviceMenu.py:85)

op: regenerating instance <ManagerDeviceMenu.ManagerDeviceMenu object at 0x7f8fd0e0eee8 (blueman+gui+manager+ManagerDeviceMenu+ManagerDeviceMenu at 0x1efce40)> 

_________

unset_op (/usr/lib/python3/dist-packages/blueman/gui/manager/ManagerDeviceMenu.py:99)

op: regenerating instance <ManagerDeviceMenu.ManagerDeviceMenu object at 0x7f8fd0e05e10 (blueman+gui+manager+ManagerDeviceMenu+ManagerDeviceMenu at 0x1efcb60)> 

_________

Generate (/usr/lib/python3/dist-packages/blueman/gui/manager/ManagerDeviceMenu.py:173)

UE BOOM 2 

_________

unset_op (/usr/lib/python3/dist-packages/blueman/gui/manager/ManagerDeviceMenu.py:99)

op: regenerating instance <ManagerDeviceMenu.ManagerDeviceMenu object at 0x7f8fd0e0eee8 (blueman+gui+manager+ManagerDeviceMenu+ManagerDeviceMenu at 0x1efce40)> 

_________

fail (/usr/lib/python3/dist-packages/blueman/gui/manager/ManagerDeviceMenu.py:124)

fail org.freedesktop.DBus.Python.blueman.bluez.errors.DBusFailedError: blueman.bluez.errors.DBusFailedError: Protocol not available



/usr/lib/python3/dist-packages/blueman/gui/manager/ManagerProgressbar.py:165: Warning: Source ID 697 was not found when attempting to remove it

  GObject.source_remove(self.gsource)

• But the problem is not the same as Bluetooth - Connection Failed: blueman.bluez.errors.DBusFailedError: Protocol Not available, because pulseaudio-module-bluetooth is already installed.

and

~$ pactl load-module module-bluetooth-discover

Failure: Module initialization failed

because it was already loaded.

Removing the device and trying to add it again: it is not found at all!

Which aspect in the normal operation of bluez - one that is available at system startup as well as by reinstalling the package - could be lost by restarting the session? - And how to avoid that loss?

It could be unrelated to your strange issue but there have been bugs in bluez for a long time: [Bug 1499858] Re: bluetoothd[650]: Failed to obtain handles for "Service Changed" characteristic

The latest posting this morning reads:

Hello again,

I compiled bluez-5.46 & installed it on ubuntu 16.04 and this has
taken care of all of the "Not enough free handles to register service"
errors and also "Failed to obtain handles for "Service Changed"
characteristic" errors and bluetooth is working better than it ever
has, for me anyway. So for me this is solved, I suppose.

Don't know if this will help anyone?? But I hope so!

Cheers,

Singtoh

Consider installing tlp radio device wizard. It will:

• Enable or disable integrated wifi, bluetooth or wwan devices upon system startup and shutdown


• Restore radio device state on system startup (from previous shutdown).


• Radio device wizard: switch radios upon network connect/disconnect and dock/undock


• Disable Wake On LAN


• Integrated WWAN and bluetooth state is restored after suspend/hibernate

Source: Welcome to TLP!