ublox SARA does not connect

[Aleksander Morgado]

Hey!

On Mon, Mar 27, 2023 at 11:00 AM ron <ron.jacoby at gmail.com> wrote:
>
> 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
>
>            |              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

These two previous lines are a bit suspicious. The home-sms-only could
indicate that you are not allowed to setup a data connection, but that
would collide with your previous statement that it worked fine in
20.04.
Then, the packet service detached thing could indicate that we're not
correctly handling that, but a bit unsure without looking at the logs.
Could you gather MM debug logs (see
https://modemmanager.org/docs/modemmanager/debugging/) with both
Ubuntu 20.04 and Ubuntu 22.04 and open a new issue in gitlab?
https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues


>
>   --------------------------------
>
>   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



-- 
Aleksander