Hardware is Pine64. Does this journalctl log look right to you?
Apr 10 02:31:27 volumio3 volumio[829]: info: [MyVolumio PluginManager] Loading plugin “bluetooth”…
Apr 10 02:31:28 volumio3 volumio[829]: info: [MyVolumio PluginManager] Starting plugin audio_interface.bluetooth
Apr 10 02:31:32 volumio3 sudo[4908]: volumio : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/chmod -R 777 /var/lib/bluetooth/*
Apr 10 02:31:32 volumio3 volumiobt[4907]: /bin/chmod: cannot access ‘/var/lib/bluetooth/*’: No such file or directory
Apr 10 02:31:33 volumio3 volumiobt[4907]: [bluetooth]# -e power on
Apr 10 02:31:33 volumio3 volumiobt[4907]: [bluetooth]# agent on
Apr 10 02:31:33 volumio3 volumiobt[4907]: [bluetooth]# discoverable on
Apr 10 02:31:33 volumio3 volumiobt[4907]: [bluetooth]# pairable on
Apr 10 02:31:33 volumio3 volumiobt[4907]: [bluetooth]# agent NoInputNoOutput
Apr 10 02:31:33 volumio3 volumiobt[4907]: [bluetooth]# default-agent
Apr 10 02:31:33 volumio3 volumiobt[4907]: [bluetooth]# quit
( any thoughts on the absence of /var/lib/bluetooth?)
+++++++++++++++++++++++++++++++++++++++++++++
sudo systemctl status bluetooth
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
Active: active (running) since Sat 2022-04-09 05:37:14 UTC; 1 day 6h ago
Docs: man:bluetoothd(8)
Main PID: 10144 (bluetoothd)
Status: “Running”
Tasks: 1 (limit: 2152)
Memory: 2.2M
CGroup: /system.slice/bluetooth.service
└─10144 /usr/lib/bluetooth/bluetoothd --noplugin=sap
+++++++++++++++++++++++++++++++++++++++++++++++++
When using bluetoothctl
[bluetooth]# power on
No default controller available
Also any search using the mobile phone bluetooth app fails to find any volumio devices.
Any ideas? Does your mobile show the volumio bluetooth device?