Modem SORACOM (SC-QGLC4-C1) : Unable to find a usable modem character set

Frederic Martinsons frederic.martinsons at
Sun Dec 20 17:48:32 UTC 2020

Ok, here is the MR:
Resolve "mmcli coredump when device is not correctly initialized" (!419) · Merge Requests · Mobile broadband connectivity / ModemManager<>
Closes #289

For the mmcli commit, I only protect the calls that I felt was the most important, but let's discuss that in the MR.
From: Aleksander Morgado <aleksander at>
Sent: Saturday, December 19, 2020 2:33 PM
To: Frederic Martinsons <frederic.martinsons at>
Cc: modemmanager-devel at <modemmanager-devel at>
Subject: Re: Modem SORACOM (SC-QGLC4-C1) : Unable to find a usable modem character set


> Thanks for the answer Aleksander, by the way, I finally got a nano sim for my model and all went well. But, sadly same errors happens if the sim is locked (same error on CSCS than when the sim was missing).
> I'll try at the beginning of next week to implement what you suggest on default encoding (by the way, what would be the best default: GSM, UTF8 ?)

I'd say you just keep the encoding as UNKNOWN, and warn instead of
failing in a fatal way.

> Do you prefer that I issue one MR for mmcli protection about peek_modem and one for default charset? Or can I do both on the same MR?

As long as you prepare 2 different commits for those 2 things, I don't
mind if they are in one single MR or in 2 MRs :)


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