Hmm, maybe my original diagnosis was correct
Please can you run the commands below (via the dashboard terminal) on the device and post the results here?
$ export DBUS_SYSTEM_BUS_ADDRESS=unix:path=/host/run/dbus/system_bus_socket
$ dbus-send --system \
--dest=org.freedesktop.DBus \
--type=method_call \
--print-reply \
/org/freedesktop/DBus \
org.freedesktop.DBus.ListNames
Network manager should be listed - for reference I have included the expected output below from a Raspberry Pi
root@dee0260:/usr/src/app# export DBUS_SYSTEM_BUS_ADDRESS=unix:path=/host/run/dbus/system_bus_socket
root@dee0260:/usr/src/app# dbus-send --system \
> --dest=org.freedesktop.DBus \
> --type=method_call \
> --print-reply \
> /org/freedesktop/DBus \
> org.freedesktop.DBus.ListNames
method return sender=org.freedesktop.DBus -> dest=:1.16 reply_serial=2
array [
string "org.freedesktop.DBus"
string "org.freedesktop.login1"
string ":1.8"
string ":1.9"
string "org.freedesktop.systemd1"
string "org.freedesktop.Avahi"
string "org.freedesktop.PolicyKit1"
string "org.freedesktop.ModemManager1"
string ":1.11"
string "org.freedesktop.NetworkManager"
string ":1.12"
string ":1.13"
string ":1.0"
string ":1.1"
string ":1.2"
string ":1.16"
string ":1.3"
string "fi.epitest.hostap.WPASupplicant"
string ":1.4"
string "fi.w1.wpa_supplicant1"
string ":1.5"
]
Thanks