Re: network manager doesn't find cdc-wdm0

[Kevin Kettinger <kkettinger gmail com>]

Hello,

i found the issue: The modemmanager plugin was missing, it can be 
enabled with "--with-modem-manager-1".

Because the image was built with yocto/bitbake, i had to create a 
.bbappend file for networkmanager recipe to enable the package feature:

recipes-connectivity/networkmanager/networkmanager_1.16.0.bbappend:
--------------------------------------------------------------
PACKAGECONFIG_append = "modemmanager"
--------------------------------------------------------------

Now the cdc-wdm0 devices shows up:
--------------------------------------------------------------
DEVICE    TYPE      STATE      CONNECTION
eth0      ethernet  connected  Wired connection 1
cdc-wdm0  gsm       connected  emnify
can0      can       unmanaged  --
can1      can       unmanaged  --
lo        loopback  unmanaged  --
--------------------------------------------------------------


Mit freundlichen Grüßen / Best regards,
Kevin Kettinger

Am 21.08.2020 um 18:17 schrieb Kevin Kettinger:
> It seems some debug output was cut off. In another log i noticed the 
> following:
>
> ----------------------------------------------------------------------------- 
>
> Loaded device plugin: NM6LowpanDeviceFactory (internal)
> Loaded device plugin: NMBondDeviceFactory (internal)
> Loaded device plugin: NMBridgeDeviceFactory (internal)
> Loaded device plugin: NMDummyDeviceFactory (internal)
> Loaded device plugin: NMEthernetDeviceFactory (internal)
> Loaded device plugin: NMInfinibandDeviceFactory (internal)
> Loaded device plugin: NMIPTunnelDeviceFactory (internal)
> Loaded device plugin: NMMacsecDeviceFactory (internal)
> Loaded device plugin: NMMacvlanDeviceFactory (internal)
> Loaded device plugin: NMPppDeviceFactory (internal)
> Loaded device plugin: NMTunDeviceFactory (internal)
> Loaded device plugin: NMVethDeviceFactory (internal)
> Loaded device plugin: NMVlanDeviceFactory (internal)
> Loaded device plugin: NMVxlanDeviceFactory (internal)
> Loaded device plugin: NMWireGuardDeviceFactory (internal)
> Loaded device plugin: NMWpanDeviceFactory (internal)
> Loaded device plugin: NMWifiFactory 
> (/usr/lib/NetworkManager/1.16.0/libnm-device-plugin-wifi.so)
> Loaded device plugin: NMOvsFactory 
> (/usr/lib/NetworkManager/1.16.0/libnm-device-plugin-ovs.so)
> Loaded device plugin: NMAtmManager 
> (/usr/lib/NetworkManager/1.16.0/libnm-device-plugin-adsl.so)
> ----------------------------------------------------------------------------- 
>
>
>  From another source it seems there should be a device plugin named 
> 'NMWwanFactory', which is missing here. Could this be the reason?
>
> Mit freundlichen Grüßen / Best regards,
> Kevin Kettinger
>
> Am 21.08.2020 um 17:59 schrieb Kevin Kettinger:
> > Hi Antonio,
> >
> > yes, after installing the system was rebooted.
> >
> > I've removed the old connection and added the debug config option.
> > The log consists of the following commands:
> >
> > -------------------------------------------------------------------------------- 
> >
> > root@b2qt-apalis-imx6:~# systemctl restart NetworkManager
> > root@b2qt-apalis-imx6:~# nmcli c add type gsm ifname ttyUSB2 con-name 
> > emnify apn em
> > Connection 'emnify' (86968473-227b-42d1-94ee-6abed0e66870) 
> > successfully added.
> > root@b2qt-apalis-imx6:~# nmcli con up emnify
> > Error: Connection activation failed: No suitable device found for this 
> > connection (device lo not available because device is strictly 
> > unmanaged).
> > -------------------------------------------------------------------------------- 
> >
> >
> > Thanks!
> >
> > Mit freundlichen Grüßen / Best regards,
> > Kevin Kettinger
> >
> > Am 21.08.2020 um 16:07 schrieb Antonio Cardace:
> > > Hi Kevin,
> > >
> > > it might sound as a stupid advice but, have you restarted 
> > > NetworkManager after
> > > installing ModemManager?
> > >
> > > Because if you installed ModemManager and/or NetworkManager-wwan and
> > > you didn't restart it NM won't be able to talk to
> > > ModemManager and will thus not find the cdc-wdm0 device.
> > >
> > > If this is not the issue please collect a TRACE-enabled log of
> > > NetworkManager[1] so that we can inspect it.
> > >
> > > Thanks,
> > > Antonio
> > >
> > > 1. 
> > > https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/blob/master/contrib/fedora/rpm/NetworkManager.conf#L49