ublox SARA does not connect

[ron]

Hi

Im running a ublox SARA modem in an embedded system on ubuntu.

It is connecting fine on ubuntu 20.04, but remains in "registered" state
when setup in ubuntu 22.04. 

It seems that NM doesn't run pppd for some reason, or is it MM issue?

 

root at ubuntu:~# mmcli -m 0

  --------------------------------

  General  |                 path: /org/freedesktop/ModemManager1/Modem/0

           |            device id: d4174b3552de7d45f5b0268aec1350664f7273c6

  --------------------------------

  Hardware |         manufacturer: u-blox

           |                model: SARA-R510M8S

           |    firmware revision: 03.15

           |            supported: gsm-umts

           |              current: gsm-umts

           |         equipment id: 352709570223149

  --------------------------------

  System   |               device:
/sys/devices/platform/soc at 0/30800000.bus/30860000.serial
<mailto:/sys/devices/platform/soc at 0/30800000.bus/30860000.serial> 

           |              drivers: imx-uart

           |               plugin: generic

           |         primary port: ttymxc0

           |                ports: ttymxc0 (at)

  --------------------------------

  Status   |       unlock retries: sim-pin (3), sim-puk (10), sim-pin2 (3),
sim-puk2 (10)

           |                state: registered

           |          power state: on

           |          access tech: lte

           |       signal quality: 41% (recent)

  --------------------------------

  Modes    |            supported: allowed: any; preferred: none

           |              current: allowed: any; preferred: none

  --------------------------------

  IP       |            supported: ipv4, ipv6, ipv4v6

  --------------------------------

  3GPP     |                 imei: 352709570223149

           |        operator name: Partner ISR

           |         registration: home-sms-only

           | packet service state: detached

  --------------------------------

  SIM      |     primary sim path: /org/freedesktop/ModemManager1/SIM/0

 

NM connection file:

 

id=ttymxc0

uuid=c0a7c307-2657-4cf1-8913-b5a826594338

type=gsm

 

[gsm]

#apn=uinternet

auto-config=TRUE

 

[ppp]

baud=921600

crtscts=true

lcp-echo-failure=5

lcp-echo-interval=30

 

[ipv4]

dns-search=

method=auto

 

[ipv6]

addr-gen-mode=stable-privacy

dns-search=

method=ignore

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