Re: Pantech UML290 - 106c:3718 - QMI Modem

[Aleksander Morgado <aleksander aleksander es>]

On Fri, Nov 17, 2017 at 12:44 AM, Greg Oliver <oliver greg gmail com> wrote:
> On Thu, Nov 16, 2017 at 2:57 PM, Aleksander Morgado
> <aleksander aleksander es> wrote:
> > > I have a Pantech UML290 LTE USB modem that talks QMI on my host.  I am
> > > having an issue setting the APN (and it appears PPP options when not
> > > running
> > > LTE) for this device.
> > >
> > > When the device is not plugged in and I use nm-connection-editor to
> > > create a
> > > new MobileBroadband connection, I can select Verizon LTE and choose my
> > > APN I
> > > need to connect to (it is an APN of a provider that uses VZ's network).
> > > When I plug the modem in, that connection is not available to use on the
> > > device (I did select "Any Device" for mobile broadband device), but it
> > > does
> > > not show.
> > >
> > > If I create the connection after it is plugged in and all of the devices
> > > are
> > > created wwan0, /dev/cdc-wdm0, then I cannot enter an APN manually - the
> > > GUI
> > > skips right over it.  I compared the 2 connection entries on the
> > > filesystem,
> > > and the one I cannot select the APN on is using CDMA and dialing the
> > > normal
> > > CDMA ppp number (#777).
> > >
> > > Any idea how I can get this to use the LTE network and still select an
> > > APN?
> >
> > What ModemManager version are you using? What's the output of "mmcli
> > -m 0" when you plug in the device?
>
>
> [greg@dell-wifi ~]$ sudo mmcli -L
>
> Found 1 modems:
> /org/freedesktop/ModemManager1/Modem/0 [QUALCOMM INCORPORATED] 42
>
> [greg@dell-wifi ~]$ sudo mmcli -m 0
>
> /org/freedesktop/ModemManager1/Modem/0 (device id
> '48d4cf9eceb8dbb2de4e13da073cb011be31f29e')
>   -------------------------
>   Hardware |   manufacturer: 'QUALCOMM INCORPORATED'
>            |          model: '42'
>            |       revision: 'L0290VWBB12F.248  1  [Nov  9 2011 08:44:21]'
>            |      supported: 'gsm-umts
>            |                  cdma-evdo
>            |                  lte
>            |                  cdma-evdo, gsm-umts
>            |                  gsm-umts, lte
>            |                  cdma-evdo, lte
>            |                  cdma-evdo, gsm-umts, lte'
>            |        current: 'cdma-evdo'

So this is being managed in QMI, which is ok, but as seen above the
"current" mode is limited to cdma-evdo for some reason (i.e. no LTE).

Can you try to run this?
mmcli -m 0 --set-current-capabilities="cdma-evdo|lte"

The device should reboot after that; then re-run "mmcli -m X" (X will
likely be 1 after the reboot) and see if the "current" field shows
"lte" as well.


>            |   equipment id: '990000479466114'
>   -------------------------
>   System   |         device: '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-1'
>            |        drivers: 'cdc_acm, qcaux, qmi_wwan'
>            |         plugin: 'Pantech'
>            |   primary port: 'cdc-wdm0'
>            |          ports: 'ttyUSB0 (qcdm), cdc-wdm0 (qmi), wwan0 (net),
> ttyACM0 (at)'
>   -------------------------
>   Numbers  |           own : '0000000345'
>   -------------------------
>   Status   |           lock: 'none'
>            | unlock retries: 'unknown'
>            |          state: 'enabled'
>            |    power state: 'on'
>            |    access tech: 'unknown'
>            | signal quality: '0' (recent)
>   -------------------------
>   Modes    |      supported: 'allowed: 2g; preferred: none
>            |                  allowed: 3g; preferred: none
>            |                  allowed: 2g, 3g; preferred: none
>            |                  allowed: 2g, 3g; preferred: 2g
>            |                  allowed: 2g, 3g; preferred: 3g
>            |                  allowed: 2g, 3g, 4g; preferred: none'
>            |        current: 'allowed: 2g, 3g; preferred: none'
>   -------------------------
>   Bands    |      supported: 'cdma-bc0-cellular-800, cdma-bc1-pcs-1900, dcs,
> egsm, pcs, g850, u2100, u1900, u850, u900'
>            |        current: 'cdma-bc0-cellular-800, cdma-bc1-pcs-1900, dcs,
> egsm, pcs, g850, u2100, u1900, u850, u900'
>   -------------------------
>   IP       |      supported: 'ipv4'
>   -------------------------
>   CDMA     |           meid: 'unknown'
>            |            esn: '808A0AA9'
>            |            sid: 'unknown'
>            |            nid: 'unknown'
>            |   registration: CDMA1x 'unknown'
>            |                 EV-DO  'unknown'
>            |     activation: 'unknown'
>   -------------------------
>   SIM      |           path: 'none'
>
>   -------------------------
>   Bearers  |          paths: 'none'
>
>
> > For this device, it should report it supports both 3GPP (e.g. lte) and
> > 3GPP2 (e.g. cdma/evdo) capabilities. For the former you need to
> > specify an APN, for the latter, you don't. In this case, the GUI
> > should allow you to specify the APN as all your connection requests
> > should go in the same way regardless of access tech.
> >
> > If you say it's defaulting to PPP on #777 it may not be doing
> > correctly the QMI probing for some reason. Debug logs would help, see:
> > https://www.freedesktop.org/wiki/Software/ModemManager/Debugging/
>
> That's a lot of info - found here ::
>
> http://repo.cistera.net/GregOliver/UML290--debug.txt
>
> Thanks for your help - if GUI screenshots would help to see what is
> happening, just let me know and I will upload some there as well.
>
> > --
> > Aleksander
> > https://aleksander.es



-- 
Aleksander
https://aleksander.es