u-blox R410M modem (QMI) configuration with modern Network-manager

[Aleksander Morgado]

Hey,

> I'm trying to use a u-blox QMI R410M with network manager on Ubuntu
> bionic witht he following which works fine on Ubuntu xenial:
>
> # nmcli connection add type gsm ifname cdc-wdm0 con-name mymodem apn $APN
> # nmcli connection up id mymodem
>
> The modem's QMI interface is indeed /dev/cdc-wdm0, my APN is correct,
> and I can connect just fine using mmcli or qmicli directly.
>
> On Xenial with network-manager-1.2.6 this works fine but on Bionic
> with network-manager-1.10.6 this results in 'Error: Connection
> activation failed: No suitable device found for this connection.'.
>
> I'm thinking the connection configuration syntax has likely changed
> I'm I'm simply using the wrong syntax?
>
> Note that I'm using libqmi-1.20.2 and modemmanager-1.8.2 from
> Aleksander's Ubuntu PPA's in both cases.
>

I'm not totally sure what might have changed in NM, but have you tried
creating the connection *without ifname*?
You can have "gsm" connection settings not bound any interface, NM
will try to find a suitable device when connecting.

-- 
Aleksander
https://aleksander.es