Hey Kevin, See replies inline below.
> > The modem I use is a Fibcom L860-GL on a Lenovo PC, on which I found when I > type in “mmcli –m index” to query the information of modem. However, I found > the result from mmcli and at is different, the picture is shown below. > What ModemManager version are you using? I can see the device is being used as a "virtual" device, so I assume you're using some modified version of MM? > > As we can tell, modem state from this two ways are mismatched. After > reviewing the code, I found that there is a function called > “get_current_consolidated_state” in mm-iface-modem.c which will build a > consolidated state. The parameter “modem_state” passed in is ‘enabled’, which > matched with the actual modem state after sending at command “at+cops=2” to > unregister from network. You sent COPS=2 via an AT port, *while* ModemManager was also using the modem? If you do that, the state reported by ModemManager will definitely be out of sync w.r.t. the real state of the modem. ModemManager doesn't poll the registration status, if you modify it "out of ModemManager's view", then you cannot expect ModemManager to know what you did. > > 1. Is this phenomena ( results from at command and mmcli are different) > a special design in order to compatible with different ‘subsystem’? > As said above, if you send AT commands yourself "out of ModemManager's view" then the state reported by mmcli vs the real state of the modem will be different always. You should not send AT commands and expect MM to know what you did. > 2. I’m not very clear with the concept of ‘subsystem’, and I failed to > find any description about it in the document. So could you kindly provide me > some guidance? In the context of mm_iface_modem_update_subsystem_state(), the subsystem just refers to either 3GPP or CDMA. For modems that support both (e.g a CDMA/EVDO+LTE device) we consolidate the registration state from states of both LTE and CDMA/EVDO. -- Aleksander https://aleksander.es _______________________________________________ ModemManager-devel mailing list ModemManager-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/modemmanager-devel
