Question about dual qmi/mbim modems

[Aleksander Morgado]

Hey,

On Wed, Jun 3, 2020 at 9:51 PM Alex Ballmer <alexb at meshplusplus.com> wrote:
>
> I have noticed that Sierra Wireless MC4755 modems can operate in both
> QMI and MBIM modes. Modemmanager seem to try to use the modem as-is in
> whatever mode it is currently operating in.
>
> However, some features are only available in QMI mode. In my experience
> I could not reset a modem in MBIM mode. It resulted in
>
> mmcli -m 0 -r
> error: couldn't reset the modem: 'GDBus.Error:org.freedesktop.
> ModemManager1.Error.Core.Unsupported: Cannot reset the modem: operation
> not supported'
>

That changes in ModemManager 1.14, the reset operation is implemented
in MBIM modems and will use either the Intel reset operation or the
QMI based one internally, whatever fits the device.

-- 
Aleksander
https://aleksander.es