I have never used Bluetooth device in Linux, until today.

Device ( a speaker ) paired, but would not connect.
( Disclaimer:    I have a 6 year old ASUS motherboard )

Here are some terminal displays:

[me@localhost ~]$ systemctl status bluetooth
● bluetooth.service - Bluetooth service
     Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; enabled; vendor>
     Active: active (running) since Wed 2020-07-08 08:53:29 CDT; 4h 28min ago
       Docs: man:bluetoothd(8)
   Main PID: 756 (bluetoothd)
     Status: "Running"
      Tasks: 1 (limit: 18759)
     Memory: 2.7M
        CPU: 192ms
     CGroup: /system.slice/bluetooth.service
             └─756 /usr/libexec/bluetooth/bluetoothd

Jul 08 08:53:28 localhost.localdomain systemd[1]: Starting Bluetooth service...
Jul 08 08:53:29 localhost.localdomain bluetoothd[756]: Bluetooth daemon 5.54
Jul 08 08:53:29 localhost.localdomain systemd[1]: Started Bluetooth service.
Jul 08 08:53:29 localhost.localdomain bluetoothd[756]: Starting SDP server
Jul 08 08:53:29 localhost.localdomain bluetoothd[756]: Bluetooth management int>
Jul 08 08:53:29 localhost.localdomain bluetoothd[756]: Failed to set mode: Bloc>
Jul 08 08:53:39 localhost.localdomain bluetoothd[756]: Failed to set mode: Bloc>
Jul 08 13:06:01 localhost.localdomain bluetoothd[756]: Endpoint registered: sen>
Jul 08 13:06:01 localhost.localdomain bluetoothd[756]: Endpoint registered: sen>



[me@localhost ~]$ bluetoothctl
Agent registered

[bluetooth]# show
Controller E0:B9:A5:F3:04:9C (public)
Name: localhost.localdomain
Alias: localhost.localdomain
Class: 0x001c0104
Powered: yes
Discoverable: yes
DiscoverableTimeout: 0x00000000
Pairable: yes
UUID: A/V Remote Control        (0000110e-0000-1000-8000-00805f9b34fb)
UUID: Audio Source              (0000110a-0000-1000-8000-00805f9b34fb)
UUID: PnP Information           (00001200-0000-1000-8000-00805f9b34fb)
UUID: Headset AG                (00001112-0000-1000-8000-00805f9b34fb)
UUID: Audio Sink                (0000110b-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
UUID: Generic Access Profile    (00001800-0000-1000-8000-00805f9b34fb)
UUID: Headset                   (00001108-0000-1000-8000-00805f9b34fb)
UUID: Generic Attribute Profile (00001801-0000-1000-8000-00805f9b34fb)
UUID: OBEX File Transfer        (00001106-0000-1000-8000-00805f9b34fb)
UUID: Message Notification Se.. (00001133-0000-1000-8000-00805f9b34fb)
UUID: IrMC Sync                 (00001104-0000-1000-8000-00805f9b34fb)
UUID: Message Access Server     (00001132-0000-1000-8000-00805f9b34fb)
UUID: OBEX Object Push          (00001105-0000-1000-8000-00805f9b34fb)
UUID: Phonebook Access Server   (0000112f-0000-1000-8000-00805f9b34fb)
Modalias: usb:v1D6Bp0246d0536
Discovering: yes
Advertising Features:
ActiveInstances: 0x00
SupportedInstances: 0x05
SupportedIncludes: tx-power
SupportedIncludes: appearance
SupportedIncludes: local-name
[CHG] Device 7C:B4:7F:21:F0:D1 RSSI: -61
[CHG] Device 7C:B4:7F:21:F0:D1 RSSI: -63
[CHG] Device 7C:B4:7F:21:F0:D1 RSSI: -70


David Locklear