Jerry Jyrer

The work around [trusted=yes] no longer works. As Igor said, Bionic one is not signed. 
 
If you must, 
 
$ sudo apt update -o Acquire::AllowInsecureRepositories=true -o Acquire::AllowDowngradeToInsecureRepositories=true
 
for the time being while it's being solved (hopefully, it is).
 
 

Thanks, Igor.  What is the simplest way to shift to mainline?  (Preferably without reinstalling.)  i.e. Which linux-image package is the correct one for this platform?

Thank you Igor. I finally got it work. Basically, follow your guidance: 
 
$vi /lib/systemd/system/
[Unit]
Description=Bluetooth nanopi
After=bluetooth.target
 
[Service]
Type=forking
ExecStartPre=/bin/echo 1 > /sys/class/rfkill/rfkill0/state
ExecStart=/usr/bin/hciattach /dev/ttyS0 bcm43xx 115200 > /dev/null
TimeoutSec=0
RemainAfterExit=yes
SysVStartPriority=99
 
[Install]
WantedBy=multi-user.target
 
$ sudo systemctl --no-reload enable nanopi-bluetooth.service
$ sudo systemctl start nanopi-bluetooth.service
 
BT is working now. : ) 
Trying to get my generic gamepad to work is another story : (
But at least, it's connected.

Right, 3.5 ones have their owned power supplies. They are 8TB MyBook. 2.5 one is powered via USB. It is a Tohisba one.