Blueman error message: Connection Failed: Unknown error

[mattgu61]

Distribution: lime
Desktop environment:

• I have consulted the Troubleshooting page and done my best effort to follow.

I have this error message Connection Failed: Unknown error when I tried to connect my headset in bluetooth. It connects but then I receive the error message and disconnect my device. I have a workaround of unpairing my headset and pairing it again to work but it's not ideal. This happened after the last update I did. Thank you.
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[crhy]

Yes I'm also having this problem quite frequently. It's definitely mint. the BT device in question hooks up pretty much immediately to all other devices.

[Bierchermuesli]

Same here. Intel Corp. AX201

blueman-applet --loglevel debug
blueman-applet 10.17.31 INFO     RecentConns:112 notify    : <Device.Device object at 0x79b7f454ee40 (blueman+bluez+Device+Device at 0x8a729b0)> 00000000-0000-0000-0000-000000000000
blueman-applet 10.17.34 DEBUG    Base:67 _properties_changed: /org/bluez/hci0/dev_AC_BF_71_CC_9D_8B {'Connected': True} [] <Device.Device object at 0x79b7f454ee40 (blueman+bluez+Device+Device at 0x8a729b0)>
blueman-applet 10.17.39 DEBUG    Base:67 _properties_changed: /org/bluez/hci0/dev_AC_BF_71_CC_9D_8B {'Connected': False} [] <Device.Device object at 0x79b7f454ee40 (blueman+bluez+Device+Device at 0x8a729b0)>

Linux mint 6.8.0-51-generic
Intel AX201
Bose QuietComfort Ultra

[ClarinetInALeatherJacket]

I have the same issue, using a Sennheiser Accentum. I also have a pair of Soundcore Liberty 4 Noise Cancelling, and they connect without issue.

blueman-applet 17.15.07 INFO     PluginManager:86 load_plugin: ['ConnectionNotifier', 'NMDUNSupport', 'Menu', 'DiscvManager', 'Networking', 'GameControllerWakelock', 'StatusNotifierItem', 'StatusIcon', 'NMPANSupport', 'TransferService', 'RecentConns', 'NetUsage', 'AutoConnect', 'KillSwitch', 'ShowConnected', 'SerialManager', 'ExitItem', 'StandardItems', 'DBusService', 'PulseAudioProfile', 'PowerManager', 'DisconnectItems', 'AuthAgent', 'DhcpClient', 'PPPSupport']
blueman-applet 17.15.07 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.DBusService.DBusService'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.Menu.Menu'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.StandardItems.StandardItems'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.StatusIcon.StatusIcon'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.PowerManager.PowerManager'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.RecentConns.RecentConns'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.ConnectionNotifier.ConnectionNotifier'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.NMDUNSupport.NMDUNSupport'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.DiscvManager.DiscvManager'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.Networking.Networking'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.GameControllerWakelock.GameControllerWakelock'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.StatusNotifierItem.StatusNotifierItem'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.NMPANSupport.NMPANSupport'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.TransferService.TransferService'>
blueman-applet 17.15.08 WARNING  PluginManager:150 __load_plugin: Not loading PPPSupport because its conflict has higher priority
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.AutoConnect.AutoConnect'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.KillSwitch.KillSwitch'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.ShowConnected.ShowConnected'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.SerialManager.SerialManager'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.ExitItem.ExitItem'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.PulseAudioProfile.AudioProfiles'>
blueman-applet 17.15.08 INFO     PulseAudioUtils:207 pa_context_event: 1
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.DisconnectItems.DisconnectItems'>
blueman-applet 17.15.08 INFO     PluginManager:159 __load_plugin: loading <class 'blueman.plugins.applet.AuthAgent.AuthAgent'>
blueman-applet 17.15.08 WARNING  PluginManager:150 __load_plugin: Not loading DhcpClient because its conflict has higher priority
blueman-applet 17.15.08 INFO     KillSwitch:106 io_event  : killswitch registered 0
blueman-applet 17.15.08 INFO     KillSwitch:122 io_event  : State: True
blueman-applet 17.15.08 INFO     PowerManager:161 update_power_state: off False | foff False | on True | current state True | new state True
blueman-applet 17.15.08 INFO     PulseAudioUtils:207 pa_context_event: 2
blueman-applet 17.15.08 INFO     KillSwitch:85 _on_connman_vanished: net.connman vanished
blueman-applet 17.15.08 INFO     TransferService:233 _on_dbus_name_appeared: org.bluez.obex :1.77
blueman-applet 17.15.08 INFO     Applet:76 _on_dbus_name_appeared: org.bluez :1.4
blueman-applet 17.15.08 INFO     Functions:99 launch    : Gtk eventtime is 0, not using LaunchContext
blueman-applet 17.15.08 INFO     Networking:78 set_nap   : set nap False
blueman-applet 17.15.08 INFO     BluezAgent:56 register_agent: Register Agent
blueman-applet 17.15.08 INFO     PulseAudioUtils:207 pa_context_event: 3
blueman-applet 17.15.08 INFO     AgentManager:17 on_registered: /org/bluez/obex/agent/blueman
blueman-applet 17.15.08 INFO     ShowConnected:55 enumerate_connections: Found 0 existing connections
blueman-applet 17.15.08 DEBUG    Base:67 _properties_changed: /org/bluez/hci0 {'Pairable': True} [] <Adapter.Adapter object at 0x74545cf2b900 (blueman+bluez+Adapter+Adapter at 0x2e072040)>
blueman-applet 17.15.08 DEBUG    DiscvManager:95 on_adapter_property_changed: prop Pairable True
blueman-applet 17.15.08 INFO     PulseAudioUtils:207 pa_context_event: 4
blueman-applet 17.15.08 INFO     PulseAudioProfile:134 on_pa_ready: PulseAudio Ready
blueman-applet 17.15.08 INFO     PulseAudioUtils:213 <lambda>  : 1
blueman-applet 17.15.44 DEBUG    Base:67 _properties_changed: /org/bluez/hci0/dev_80_C3_BA_47_17_AD {'Connected': True} [] <Device.Device object at 0x74545cf3b040 (blueman+bluez+Device+Device at 0x2db18be0)>
blueman-applet 17.15.47 DEBUG    Base:67 _properties_changed: /org/bluez/hci0/dev_80_C3_BA_47_17_AD {'Connected': False} [] <Device.Device object at 0x74545cf3b040 (blueman+bluez+Device+Device at 0x2db18be0)>
^Cblueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.AuthAgent.AuthAgent object at 0x74546016aba0>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.DisconnectItems.DisconnectItems object at 0x74545cef7470>
blueman-applet 17.16.05 INFO     PulseAudioUtils:380 _on_delete: Destroying PulseAudioUtils instance
blueman-applet 17.16.05 INFO     PulseAudioUtils:207 pa_context_event: 6
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.PulseAudioProfile.AudioProfiles object at 0x745460168f80>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.ExitItem.ExitItem object at 0x74545cf3c650>
blueman-applet 17.16.05 DEBUG    SerialManager:50 on_delete : Terminating any running scripts
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.SerialManager.SerialManager object at 0x74545cf3c1a0>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.ShowConnected.ShowConnected object at 0x74545cef4860>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.KillSwitch.KillSwitch object at 0x745460548d40>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.AutoConnect.AutoConnect object at 0x74545ced2330>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.TransferService.TransferService object at 0x74545cef7a10>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.NMPANSupport.NMPANSupport object at 0x74545cef7290>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.StatusNotifierItem.StatusNotifierItem object at 0x74545cef7ec0>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.GameControllerWakelock.GameControllerWakelock object at 0x74545cef4bc0>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.Networking.Networking object at 0x7454638a03b0>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.DiscvManager.DiscvManager object at 0x74546019cfe0>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.NMDUNSupport.NMDUNSupport object at 0x745463924d10>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.ConnectionNotifier.ConnectionNotifier object at 0x745463881100>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.RecentConns.RecentConns object at 0x74545cf3c410>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.PowerManager.PowerManager object at 0x74545ced1370>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <StatusIcon.StatusIcon object at 0x74546389ff80 (blueman+plugins+applet+StatusIcon+StatusIcon at 0x2e072780)>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.StandardItems.StandardItems object at 0x74545cef7830>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.Menu.Menu object at 0x74545ced0c20>
blueman-applet 17.16.05 DEBUG    BasePlugin:63 _on_plugin_delete: Deleting plugin instance <blueman.plugins.applet.DBusService.DBusService object at 0x745463882780>

  Kernel: 6.8.0-51-generic arch: x86_64 bits: 64 compiler: gcc v: 13.3.0 clocksource: tsc
  Desktop: Cinnamon v: 6.2.9 tk: GTK v: 3.24.41 wm: Muffin v: 6.2.0 vt: 7 dm: LightDM v: 1.30.0
    Distro: Linux Mint 22 Wilma base: Ubuntu 24.04 noble
Network:
  Device-1: Intel Comet Lake PCH CNVi WiFi vendor: Rivet Networks Dual Band Wi-Fi 6 Killer AX1650s
    160MHz 2x2 driver: iwlwifi v: kernel bus-ID: 00:14.3 chip-ID: 8086:06f0 class-ID: 0280
  IF: wlp0s20f3 state: up mac: <filter>
Bluetooth:
  Device-1: Intel AX201 Bluetooth driver: btusb v: 0.8 type: USB rev: 2.0 speed: 12 Mb/s lanes: 1
    bus-ID: 1-14:7 chip-ID: 8087:0026 class-ID: e001
  Report: hciconfig ID: hci0 rfk-id: 0 state: up address: <filter> bt-v: 5.2 lmp-v: 11
    sub-v: 20f9 hci-v: 11 rev: 20f9 class-ID: 7c010c
  Compilers: gcc: 13.3.0 Client: Cinnamon v: 6.2.9 inxi: 3.3.34

[cschramm]

Audio devices are managed by your sound server, PipeWire in Linux Mint 22.

[ClarinetInALeatherJacket]

Ik its odd, but I found and followed this forum: https://bbs.archlinux.org/viewtopic.php?id=267233. I deleted my /var/lib/bluetooth folder, and now it connects w/o issue. No guarentees that this doesnt have long term side effects, but it seems to have at least temporarily helped. I also completely restarted PipeWire using :

systemctl --user restart wireplumber pipewire pipewire-pulse

Not sure if that contributed in any way, but I did do it before deleted /var/lib/bluetooth

@mattgu61 @crhy @Bierchermuesli