ModemManager Issue with multiple WWAN Sierrawireless Ubuntu 22.04

Ankur Jain ankurjain230981 at
Sun Mar 3 13:12:30 UTC 2024

Hi Aleksander,

Thanks for your reply.

I want to report an issue with the modem manager in Ubuntu 22.04. Even
though the modem firmware is updated, the modem manager service causes
frequent disconnection issues. However, when I disable the modem manager
service and use qmicli and minicoM methods, the modem works fine without
any disconnections. I tried contacting the modem using Sierra MC7304 &
MC7430, but it did not solve the problem. The modem manager provides all
the necessary details, but it keeps resetting frequently when I use the
internet or live streaming applications.
 I would appreciate your support in resolving this issue.
 Please let me know if you require any additional information or logs.

On Sun, 3 Mar 2024, 1:39 pm Aleksander Morgado, <aleksandermj at>

> Hey.
> > 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
> --
> Aleksander
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