Re: cdc_mbim problems with Fibocom L831-EAU

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Is there anything I can do to debug this issue?

On Thu, Jun 15, 2017 at 1:01 AM, Patrick Chilton <chpatrick@xxxxxxxxx> wrote:
>> But for the above stuff, note that MBIM modems often (always?) do *not*
>> support DHCP on the net interface.  You'll get best results by reading
>> the IP configuration using the MBIM protocol and assigning those
>> details to the device.  ModemManager will retrieve those for you, but
>> it does not do IP configuration, instead leaving that up to something
>> like NetworkManager or custom scripts.
>>
>> mbim-network also does not set the IP configuration for you, since a
>> lot more is involved than just assigning the IP address to the
>> interface.  (eg, should the DNS servers be written to resolv.conf?
>> what if something else is managing resolv.conf?  Should a default route
>> be added through the interface?  what if something else is managing the
>> default route or you don't want that to happen?)
>
> When I tried it, I disabled everything network-related and set the IP
> address, net mask, default route and resolv.conf manually based on
> data from mbimcli. When I tried to ping google.com afterwards it
> failed due to "System error".
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