Hello! I have a bluetooth headset SONY MDR-XB650BT and I cannot pair and connect it. I got it several months ago and it worked well, I configured it using blueman-manager but now I cannot. Hardware: 02:00.0 Network controller: Intel Corporation Wireless 7265 (rev 59) Subsystem: Intel Corporation Dual Band Wireless-AC 7265 Kernel driver in use: iwlwifi Kernel modules: iwlwifi Software: Debian Stretch 9.6 Linux gregf 4.18.0-0.bpo.1-amd64 #1 SMP Debian 4.18.6-1~bpo9+1 (2018-09-13) x86_64 GNU/Linux ii blueman 2.0.4-1 amd64 Graphical bluetooth manager ii bluetooth 5.43-2+deb9u1 all Bluetooth support ii bluez 5.43-2+deb9u1 amd64 Bluetooth tools and daemons ii bluez-firmware 1.2-3 all Firmware for Bluetooth devices ii bluez-hcidump 5.43-2+deb9u1 amd64 Analyses Bluetooth HCI packets ii bluez-obexd 5.43-2+deb9u1 amd64 bluez obex daemon ii bluez-tools 0.2.0~20140808-5+b2 amd64 Set of tools to manage Bluetooth devices for linux ii libbluetooth3:amd64 5.43-2+deb9u1 amd64 Library to use the BlueZ Linux Bluetooth stack ii pulseaudio-module-bluetooth 10.0-1+deb9u1 amd64 Bluetooth module for PulseAudio sound server ii python-bluez 0.22-1 amd64 Python wrappers around BlueZ for rapid bluetooth development This is part of my logs: https://pastebin.com/xPnm6SgW I'm trying to do it via `bluetoothctl` but get something like: [bluetooth]# info 00:18:09:C5:44:1E Device 00:18:09:C5:44:1E Name: MDR-XB650BT Alias: MDR-XB650BT Class: 0x240404 Icon: audio-card Paired: no Trusted: no Blocked: no Connected: no LegacyPairing: no UUID: Headset (00001108-0000-1000-8000-00805f9b34fb) UUID: Audio Sink (0000110b-0000-1000-8000-00805f9b34fb) UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb) UUID: A/V Remote Control (0000110e-0000-1000-8000-00805f9b34fb) UUID: Handsfree (0000111e-0000-1000-8000-00805f9b34fb) [bluetooth]# agent on Agent registered [bluetooth]# trust 00:18:09:C5:44:1E [CHG] Device 00:18:09:C5:44:1E Trusted: yes Changing 00:18:09:C5:44:1E trust succeeded [bluetooth]# pair 00:18:09:C5:44:1E Attempting to pair with 00:18:09:C5:44:1E [CHG] Device 00:18:09:C5:44:1E Connected: yes Failed to pair: org.bluez.Error.AuthenticationFailed [CHG] Device 00:18:09:C5:44:1E Connected: no [CHG] Device 00:18:09:C5:44:1E Connected: yes [CHG] Device 00:18:09:C5:44:1E Connected: no [bluetooth]# pair 00:18:09:C5:44:1E Attempting to pair with 00:18:09:C5:44:1E [CHG] Device 00:18:09:C5:44:1E Connected: yes Failed to pair: org.bluez.Error.AuthenticationFailed [CHG] Device 00:18:09:C5:44:1E Connected: no I'm sure it works but how to detect the reason why it cannot now, I got out of my hairs. Could you help me, please? Thank you!