MC7455 'Call Failed'

[Tim Harvey]

On Fri, Jun 23, 2017 at 9:23 AM, Dan Williams <dcbw at redhat.com> wrote:
> On Thu, 2017-06-22 at 15:11 -0700, Tim Harvey wrote:
>> On Thu, Jun 22, 2017 at 2:59 PM, Dan Williams <dcbw at 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 at gateworks.c
>> > > om>
>> > > wrote:
>> > > > > > Also, I'm unclear how to NetworkManager on the QMI devices:
>> > > > > > root at ventana:~# nmcli connection add type gsm ifname cdc-
>> > > > > > wdm1
>> > > > > > con-name
>> > > > > > mc7455 apn h2g2
>> > > > > > Connection 'mc7455' (5dc4516e-e857-4917-9542-0dee211b692a)
>> > > > > > successfully added.
>> > > > > > root at 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 at 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 at ventana:~# nmcli connection down id 'Wired connection 1'
>> Connection 'Wired connection 1' successfully deactivated (D-Bus
>> active
>> path: /org/freedesktop/NetworkManager/ActiveConnection/1)
>> root at 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 at 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 at 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 at 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 at 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 at ventana:~# nmcli connection add type gsm ifname cdc-wdm0 con-
>> name
>> mc7455 apn h2g2
>> Connection 'mc7455' (426c0811-1f1e-439b-b497-b839502c6a4f)
>> successfully added.
>> root at ventana:~# nmcli connection up id mc7455
>> Error: Connection activation failed: No suitable device found for
>> this
>> connection.
>> ^^^^ No IP config on wwan0
>
> Yeah, because "no suitable device found".  Can you 'nmcli g log level
> trace' and reproduce the issue, then we can take a look at the NM logs.
>  Depending on your platform, that could be "journalctl -b -u
> NetworkManager" or they could be files somewhere in /var/log like
> /var/log/daemon.log, /var/log/NetworkManager.log, or /var/log/messages.
>
> Dan

Dan,

I removed /etc/NetworkManager/system-connections/* and then the MC7455
via NetworkManager worked fine. I guess there was some config there
left from my previous testing that was getting in my way.

Thanks for the help!

Tim