I wanted to provide an additional piece of information I realized: When trying to set the initiali EPS bearer settings I get the following error from mmcli:
'GDBus.Error:org.freedesktop.ModemManager1.Error.Core.Unsupported: Operation not supported' and I also noticed that mmcli reports the following in 3gpp eps : ue mode of operation: csps-2 Im assuming this has something to do with my issue? Previously I had no problem with ModemManager 1.18 setting up the EPS bearer settings. Thanks again Sent with [Proton Mail](https://proton.me/) secure email. ------- Original Message ------- On Thursday, November 24th, 2022 at 9:26 AM, VT102 <vt...@protonmail.com> wrote: > Hello all, > > I am working with an mPCI Telit LE910C4 modem connected to a Linux System on > a Chip running Ubunut 20.04. > > With 1.18 ModemManager installed I noticed that serial ports were being > listed as ignored except for a GPS port was available through a tty, this > meant I couldnt issue AT commands. I also needed bit error rate from the > mmlib-glib API so I decided to build ModemManager 1,21. > > Upon upgrading the modem no longer recognizes as a qmi device, but the AT > command tty terminals are available. I was hoping for some advice on how to > investigate this behavior. I did not build libqmi from source because > whenever I try to compile on the device compilation freezes (overnight) on > compiling certain *.o files. However, I am able to get the modem connected. > > Any advice on how to debug why the modem is no longer being recognized as a > qmi device? > I am wondering if I need to change the USB configuration of the modem,but > this seems likee it would be strange, as it was interacting with the modem > via qmi previously via cdc_wdm0. > > Below I will post output from mmcli from version 1.21 with QMI not working. > > Thanks, > Rick > > -------------------------------- > General | path: /org/freedesktop/ModemManager1/Modem/0 > | device id: > -------------------------------- > Hardware | manufacturer: Telit > | model: LE910C4-NF > | firmware revision: 25.21.660-P0F.661806 > | supported: gsm-umts, lte > | current: gsm-umts, lte > | equipment id: > -------------------------------- > System | device: > /sys/devices/platform/soc@0/32c00000.bus/32e50000.usb/ci_hdrc.1/usb1/1-1/1-1.2 > | drivers: option, qmi_wwan > | plugin: telit > | primary port: ttyUSB2 > | ports: ttyUSB0 (ignored), ttyUSB1 (gps), ttyUSB2 (at), > | ttyUSB3 (at), ttyUSB4 (ignored), wwan0 (ignored) > -------------------------------- > Status | unlock retries: sim-pin (3), sim-puk (10), sim-pin2 (10), sim-puk2 > (10) > | state: connected > | power state: on > | access tech: lte > | signal quality: 85% (recent) > -------------------------------- > Modes | supported: allowed: 2g; preferred: none > | allowed: 3g; preferred: none > | allowed: 2g, 3g; preferred: none > | allowed: 4g; preferred: none > | allowed: 2g, 4g; preferred: none > | allowed: 3g, 4g; preferred: none > | allowed: 2g, 3g, 4g; preferred: none > | current: allowed: 3g, 4g; preferred: none > -------------------------------- > IP | supported: ipv4, ipv6, ipv4v6 > -------------------------------- > 3GPP | imei: > | operator id: 310410 > | operator name: AT&T > | registration: roaming > | packet service state: attached > -------------------------------- > 3GPP EPS | ue mode of operation: csps-2 > -------------------------------- > SIM | primary sim path: /org/freedesktop/ModemManager1/SIM/0 > -------------------------------- Bearer | paths: > /org/freedesktop/ModemManager1/Bearer/0 > > Sent with [Proton Mail](https://proton.me/) secure email.
