Fibocom L850-GL hangs upon connect.

[Vincent Bernat]

 ❦ 13 août 2018 21:02 +0200, Aleksander Morgado <aleksander at aleksander.es>:

>> If this modem is going to end up stuck with pure PPP and therefore maxing
>> out at 25Mbps, then I'm not too concerned anyways since its use is rather
>> limited. I just wish I could figure out how to switch this thing to MBIM
>> (Tried everything listed in the AT Command reference guide, including
>> factory resets and defaults.).
>>
>
> Talked to Fibocom engineers and unfortunately that firmware version
> you're using cannot do MBIM :/

On the latest Lenovo X1/T580/T480, this modem is plugged on a
PCIe-enabled M2 port and boots as a PCI device. It seems Linux isn't
able to handle that. People tried to tape the PCIe pins to make it boot
as USB, but it's then blacklisted in the BIOS. Maybe you have some hints
on how to make this modem switch to USB after booting?

I don't own one yet, so I cannot really help with the specifics.

Relevant thread:
 https://forums.lenovo.com/t5/Linux-Discussion/Linux-support-for-WWAN-LTE-L850-GL-on-T580-T480/m-p/4067969
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