My Bluedio T4 headset does not automatically connect in Ubuntu Linux 20.04 LTS
The device is Trusted and is enabled in PulseAudio /etc/pulse/default.pa. Using Wireshark I can see it's connected shortly to the controler. After a few milliseconds however it sends a Disconnection Request and the device disconnects accordingly.
$ bluetoothctl info 17:07:11:00:00:00 Device 17:07:11:DD:0D:27 (public) Name: Bluedio T Alias: Bluedio T Class: 0x00240404 Icon: audio-card Paired: yes Trusted: yes Blocked: no Connected: no LegacyPairing: no UUID: Audio Sink (0000110b-0000-1000-8000-00805f000000) UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f000000) UUID: A/V Remote Control (0000110e-0000-1000-8000-00805f000000) UUID: Handsfree (0000111e-0000-1000-8000-00805f000000) $ cat /etc/pulse/default.pa | grep -B 1 -A 1 module-switch-on-connect ### Use hot-plugged devices like Bluetooth or USB automatically (LP: #1702794) .ifexists module-switch-on-connect.so load-module module-switch-on-connect .endif No. Time Source Destination Protocol Length Info 1 0.000000 controller host HCI_EVT 13 Rcvd Connect Request 2 0.000030 host controller HCI_CMD 11 Sent Accept Connection Request 3 0.001019 controller host HCI_EVT 7 Rcvd Command Status (Accept Connection Request) 4 0.175023 controller host HCI_EVT 11 Rcvd Role Change 5 0.195976 controller host HCI_EVT 14 Rcvd Connect Complete 6 0.196106 host controller HCI_CMD 6 Sent Read Remote Supported Features ... 36 0.311036 localhost () 17:07:11:dd:0d:27 (Bluedio T) L2CAP 17 Sent Configure Request (DCID: 0x0040) 37 0.317005 controller host HCI_EVT 8 Rcvd Number of Completed Packets 38 0.318999 controller host HCI_EVT 8 Rcvd Number of Completed Packets 39 0.364021 17:07:11:dd:0d:27 (Bluedio T) localhost () L2CAP 17 Rcvd Configure Request (DCID: 0x0040) 40 0.364073 localhost () 17:07:11:dd:0d:27 (Bluedio T) L2CAP 23 Sent Configure Response - Success (SCID: 0x0040) 41 0.366020 17:07:11:dd:0d:27 (Bluedio T) localhost () L2CAP 23 Rcvd Configure Response - Success (SCID: 0x0040) 42 0.369020 controller host HCI_EVT 8 Rcvd Number of Completed Packets 43 0.422020 17:07:11:dd:0d:27 (Bluedio T) localhost () SDP 42 Rcvd Service Search Attribute Request : Handsfree Audio Gateway: L2CAP: RFCOMM: [Protocol Descriptor List 0x0004] [Bluetooth Profile Descriptor List 0x0009] [(HFP AG) Network 0x0301] [(HFP AG) Supported Features 0x0311] 44 0.422245 localhost () 17:07:11:dd:0d:27 (Bluedio T) SDP 19 Sent Service Search Attribute Response 45 0.427979 controller host HCI_EVT 8 Rcvd Number of Completed Packets 46 0.479997 17:07:11:dd:0d:27 (Bluedio T) localhost () L2CAP 17 Rcvd Disconnection Request (SCID: 0x0040, DCID: 0x0040, PSM: 0x0001, Service: SDP) 47 0.480021 localhost () 17:07:11:dd:0d:27 (Bluedio T) L2CAP 17 Sent Disconnection Response (SCID: 0x0040, DCID: 0x0040, PSM: 0x0001, Service: SDP) 48 0.483982 controller host HCI_EVT 8 Rcvd Number of Completed Packets 49 0.687030 controller host HCI_EVT 7 Rcvd Disconnect Complete 50 0.748115 host controller HCI_CMD 5 Sent Write Scan Enable 51 0.751010 controller host HCI_EVT 7 Rcvd Command Complete (Write Scan Enable) Since this device connects to my Android device without any problems, I have no idea why this is happening.
