ModemManager using QMI doesnt always work in the first attemp.

[Aleksander Morgado]

On Tue, Jan 19, 2016 at 4:51 PM, José <Joseddg92 at gmail.com> wrote:
> I have update to the last firmware (17.01.522  1  [Oct 16 2014
> 07:00:00]) and the issue is still reproducible.
>
> I am almost sure that the issue is related to power management.
>
> When the modem is in AT+CFUN=4, trying to enable it with ModemManager
> (mmcli -m 0 -e) does not work. Trying to change the power state does
> also not work (mmcli --set-power-state-on).
>
> root at ccimx6sbc:~# mmcli -m 0 --set-power-state-on
> ModemManager[791]: Couldn't reload current power state: Unhandled
> power state: 'reset' (4)
> error: couldn't set new power state in the modem:
> 'GDBus.Error:org.freedesktop.libqmi.Error.Protocol.InvalidTransaction:
> Couldn't set operating mode: QMI protocol error (60):
> 'InvalidTransaction''
> root at ccimx6sbc:~# mmcli -m 0 -e
> ModemManager[791]: <info>  Modem
> /org/freedesktop/ModemManager1/Modem/0: state changed (disabled ->
> enabling)
> ModemManager[791]: <warn>  (ttyUSB2): port attributes not fully set
> ModemManager[791]: <warn>  (ttyUSB3): port attributes not fully set
> ModemManager[791]: Couldn't reload current power state: Unhandled
> power state: 'reset' (4)
> ModemManager[791]: <info>  Modem
> /org/freedesktop/ModemManager1/Modem/0: state changed (enabling ->
> disabled)
> error: couldn't enable the modem:
> 'GDBus.Error:org.freedesktop.libqmi.Error.Protocol.InvalidTransaction:
> Couldn't set operating mode: QMI protocol error (60):
> 'InvalidTransaction''
>
> Note that a SIM card is inserted.
>
>
> I have also noticed that ModemManager uses not documented AT+CFUN modes:
>
> root at ccimx6sbc:~# mmcli -m 0 --set-power-state-off
> ModemManager[791]: <info>  Modem powered off... may no longer be accessible
> successfully set new power state in the modem
> root at ccimx6sbc:~# microcom /dev/ttyUSB2
>
> OK
> at+cfun?
> +CFUN: 7
>
> OK
> root at ccimx6sbc:~# mmcli -m 0 --set-power-state-low
> successfully set new power state in the modem
> root at ccimx6sbc:~# microcom /dev/ttyUSB2
> at+cfun?
> +CFUN: 6
>
> OK
>
> The only documented modes are 0, 1, 4 ,5 (see
> http://www.coniugo.de/tl_files/dateien/downloads/at/AT%20Commands%20LE910.pdf,
> page 106).
>
> I have noticed that mmcli -m 0 reports that the Generic plugin is
> being used. Should it be using some specific for Telit?
>

Yes, it should be using the Telit plugin.


> Just in case this is the report of mmcli -m 0 when the modem is in low
> power state:
>
> root at ccimx6sbc:~# mmcli -m 0
>
> /org/freedesktop/ModemManager1/Modem/0 (device id
> 'dff8e6a4b1f4c5db7b0e79cea559b461ae4f450e')
>   -------------------------
>   Hardware |   manufacturer: 'QUALCOMM INCORPORATED'
>            |          model: '3'
>            |       revision: '17.01.522  1  [Oct 16 2014 07:00:00]'
>            |      supported: 'gsm-umts
>            |                  lte
>            |                  gsm-umts, lte'
>            |        current: 'gsm-umts, lte'
>            |   equipment id: 'unknown'
>   -------------------------
>   System   |         device:
> '/sys/devices/soc0/soc.0/2100000.aips-bus/2184200.usb/ci_hdrc.1/usb1/1-1/1-1.3'
>            |        drivers: 'qmi_wwan, option1'
>            |         plugin: 'Generic'
>            |   primary port: 'cdc-wdm0'
>            |          ports: 'ttyUSB0 (qcdm), ttyUSB2 (at), ttyUSB3
> (at), wwan0 (net), cdc-wdm0 (qmi)'
>   -------------------------
>   Numbers  |           own : 'unknown'
>   -------------------------
>   Status   |           lock: 'sim-pin2'
>            | unlock retries: 'sim-pin (3), sim-pin2 (3), sim-puk (10),
> sim-puk2 (10)'
>            |          state: 'disabled'
>            |    power state: 'low'
>            |    access tech: 'unknown'
>            | signal quality: '0' (cached)
>   -------------------------
>   Modes    |      supported: 'allowed: 2g, 3g, 4g; preferred: none'
>            |        current: 'allowed: 2g, 3g, 4g; preferred: none'
>   -------------------------
>   Bands    |      supported: 'cdma-bc15-aws, dcs, egsm, u2100, u800,
> u850, u900, eutran-iii, eutran-vii, eutran-xx'
>            |        current: 'cdma-bc15-aws, dcs, egsm, u2100, u800,
> u850, u900, eutran-iii, eutran-vii, eutran-xx'
>   -------------------------
>   IP       |      supported: 'ipv4, ipv6, ipv4v6'
>   -------------------------
>   3GPP     |           imei: 'unknown'
>            |  enabled locks: 'none'
>            |    operator id: 'unknown'
>            |  operator name: 'unknown'
>            |   subscription: 'unknown'
>            |   registration: 'unknown'
>   -------------------------
>   SIM      |           path: '/org/freedesktop/ModemManager1/SIM/0'
>
>   -------------------------
>   Bearers  |          paths: 'none'
>



-- 
Aleksander
https://aleksander.es