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Despite adding auto wlan0 or auto ppp0 to my /etc/network/interfaces configuration, these interfaces don't seem to want to come online at boot time.

I got this issue initially when I was using WiFi but I thought it was a one-off issue. I fixed it by adding allow-hotplug wlan0 like this:

allow-hotplug wlan0
auto wlan0
iface wlan0 inet dhcp
    ...

But now I'm trying to add my Adafruit FONA's ppp connection at boot time with the following code that they recommend in the user manual under Automatic PPP Connection On Boot:

auto fona
iface fona inet ppp
    provider fona

But I get nothing at boot time. As soon as I type ifup fona, it works and pulls up a connection just fine.

Bonus question:

Is there a nice way to manage such a ppp connection so that it will automatically redial when disconnected and such? I'm using NetworkManager but I can't work out how to make this happen.

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Chris Watts
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  • For the bonus question, I've found that ModemManager is probably the way to go, but I can't find how to manually add a modem without using the GUI. Can anyone point me in the right direction? – Chris Watts Feb 26 '16 at 18:41
  • I figured out how to get ModemManager to pick up serial devices. See this post: http://askubuntu.com/questions/740584/enabling-serial-network-devices-with-modemmanager/740585 – Chris Watts Feb 29 '16 at 20:33

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