Re: MC7455 'Call Failed'

[Tim Harvey <tharvey gateworks com>]

On Thu, Jun 22, 2017 at 2:59 PM, Dan Williams <dcbw redhat com> wrote:
> On Thu, 2017-06-22 at 23:29 +0200, Aleksander Morgado wrote:
> > On Thu, Jun 22, 2017 at 10:11 PM, Tim Harvey <tharvey gateworks com>
> > wrote:
> > > > > Also, I'm unclear how to NetworkManager on the QMI devices:
> > > > > root@ventana:~# nmcli connection add type gsm ifname cdc-wdm1
> > > > > con-name
> > > > > mc7455 apn h2g2
> > > > > Connection 'mc7455' (5dc4516e-e857-4917-9542-0dee211b692a)
> > > > > successfully added.
> > > > > root@ventana:~# nmcli connection up id mc7455
> > > > > Error: Connection activation failed: No suitable device found
> > > > > for this
> > > > > connection.
> > > > >
> > > > > What is the appropriate interface to use for QMI devices (wwan1
> > > > > gives
> > > > > the same error)? This is supposed to be the 'control interface'
> > > > > not
> > > > > the 'network interface' correct?
> > > >
> > > > Retry without the "ifname cdc-wdm1" part; just add a gsm
> > > > connection
> > > > type with the APN settings, without binding to an explicit modem,
> > > > and
> > > > try to get that connected.
> > >
> > > I tried that originally but it requires ifname:
> > >
> > > root@ventana:~# nmcli connection add type gsm con-name mc7455 apn
> > > h2g2
> > > Error: mandatory 'ifname' not seen before 'apn'.
> >
> > Dan, Thomas? I keep forgetting about this... How do you create a
> > connection not bound to any device? And, how do yo create a
> > connection
> > bound to a given device/sim?
>
> I filed a bug on that:
>
> https://bugzilla.gnome.org/show_bug.cgi?id=780323
>
> Dan

Dan, it looks like network manager ignores the 'interface-name' param
in the connection configs as I have an MC7354 here that I was able to
use fine with NetworkManager by giving it 'ifname cdc-wdm0' (which is
wrong)

On the MC7354:
root@ventana:~# nmcli connection down id 'Wired connection 1'
Connection 'Wired connection 1' successfully deactivated (D-Bus active
path: /org/freedesktop/NetworkManager/ActiveConnection/1)
root@ventana:~# nmcli connection add type gsm ifname cdc-wdm0 con-name
mc7354 apn m2m.com.attz
Connection 'mc7354' (6d89ff6e-6eb6-4f0f-80d1-fb081165f710) successfully added.
# show status
root@ventana:~# nmcli connection show
NAME                UUID                                  TYPE            DEVICE
Wired connection 1  ea640ea4-3049-39e4-9cdf-a5e53971ced8  802-3-ethernet  --
mc7354              6d89ff6e-6eb6-4f0f-80d1-fb081165f710  gsm             --
# connect
root@ventana:~# nmcli connection up id mc7354
[  305.557465] IPv6: ADDRCONF(NETDEV_UP): wwan0: link is not ready
Error: Connection activation failed: Active connection could not be
attached to the device
^^^^^ not sure what this is from - the connection is made and traffic works
[  305.688145] systemd-journald[162]: Successfully sent stream file
descriptor to service manager.
[  305.774230] systemd-journald[162]: Successfully sent stream file
descriptor to service manager.
root@ventana:~# ping www.google.com
^^^^^ works

I'm still not clear why using network-manager fails on the MC7455
which I can get working with libqmi directly and with modemmanager
directly:

On the MC7455:
root@ventana:~# nmcli connection down 'Wired connection 1'
Connection 'Wired connection 1' successfully deactivated (D-Bus active
path: /org/freedesktop/NetworkManager/ActiveConnection/1)
[   44.722377] systemd-journald[168]: Successfully sent stream file
descriptor to service manager.
root@ventana:~# nmcli connection add type gsm ifname cdc-wdm0 con-name
mc7455 apn h2g2
Connection 'mc7455' (426c0811-1f1e-439b-b497-b839502c6a4f) successfully added.
root@ventana:~# nmcli connection up id mc7455
Error: Connection activation failed: No suitable device found for this
connection.
^^^^ No IP config on wwan0

Tim