ModemManager Issue with multiple WWAN Sierrawireless Ubuntu 22.04

Aleksander Morgado aleksandermj at
Sun Mar 3 08:09:18 UTC 2024


> Please let me understand the issue with multiple WWANs frequently disconnecting and reconnecting I am using Sierra wireless modems on the Ubuntu 22.04 desktop. I have updated the drivers and tried all available internet options, but no luck. It is not modems are not getting connected, modems are connected but while giving some load on them they start misbehaving (WWANs frequently disconnecting and reconnecting) I am using the default modem manager app from free Desktop org
> Appreciate it if someone could help

This looks like the modem resetting itself, which could indicate modem
firmware errors. Make sure you have the latest firmware available from
Sierra installed in the device, and if it still happens, report it at


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