***I have a recent Fossil's ModemManager 1.16.6-2-20.04 and under kernel 5.8.x
it works:
ModemManager.service - Modem Manager
Loaded: loaded (/lib/systemd/system/ModemManager.service; enabled; vendor >
Active: active (running) since Fri 2021-11-12 14:46:59 CET; 2h 19min ago
Main PID: 661 (ModemManager)
Tasks: 5 (limit: 19006)
Memory: 11.6M
CGroup: /system.slice/ModemManager.service
├─ 661 /usr/sbin/ModemManager
└─1054 /usr/libexec/qmi-proxy
nov 12 14:47:03 UB820 ModemManager[661]: <warn> [modem0/sim0] couldn't load li>
nov 12 14:47:03 UB820 ModemManager[661]: <warn> [modem0] couldn't load list of>
nov 12 14:47:03 UB820 ModemManager[661]: <warn> [modem0] couldn't load UE mode>
nov 12 14:47:04 UB820 ModemManager[661]: <info> [modem0] state changed (unknow>
nov 12 14:47:04 UB820 ModemManager[661]: <info> [modem0] state changed (disabl>
nov 12 14:47:04 UB820 ModemManager[661]: <info> [modem0] power state updated: >
nov 12 14:47:04 UB820 ModemManager[661]: <info> [modem0] state changed (enabli>
nov 12 14:47:05 UB820 ModemManager[661]: <info> [modem0] 3GPP registration sta>
nov 12 14:47:05 UB820 ModemManager[661]: <info> [modem0] 3GPP registration sta>
nov 12 14:47:05 UB820 ModemManager[661]: <info> [modem0] state changed (enable>
***After Ubuntu update to recent kernel 5.1x (5.10.x,5.11.x,5.13.x)
ModemManager stays the same version and displays:
sudo systemctl status ModemManager
● ModemManager.service - Modem Manager
Loaded: loaded (/lib/systemd/system/ModemManager.service; enabled; vendor
preset: enabled)
Active: active (running) since Fri 2021-11-12 17:08:24 CET; 1min 30s ago
Main PID: 818 (ModemManager)
Tasks: 3 (limit: 18992)
Memory: 6.7M
CGroup: /system.slice/ModemManager.service
└─818 /usr/sbin/ModemManager
nov 12 17:09:53 UB820 ModemManager[818]: <info> [base-manager] couldn't check
support for device '/sys/devices/pci0000:00/0000:00:14.0/usb1/>
nov 12 17:09:54 UB820 ModemManager[818]: <info> [base-manager] port cdc-wdm0
released by device '/sys/devices/pci0000:00/0000:00:14.0/usb1/1>
nov 12 17:09:54 UB820 ModemManager[818]: <info> [base-manager] port wwan0
released by device '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-3'
nov 12 17:09:54 UB820 ModemManager[818]: <info> [base-manager] couldn't check
support for device '/sys/devices/pci0000:00/0000:00:14.0/usb1/>
nov 12 17:09:54 UB820 ModemManager[818]: <info> [base-manager] port cdc-wdm0
released by device '/sys/devices/pci0000:00/0000:00:14.0/usb1/1>
nov 12 17:09:54 UB820 ModemManager[818]: <info> [base-manager] port wwan0
released by device '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-3'
nov 12 17:09:54 UB820 ModemManager[818]: <info> [base-manager] couldn't check
support for device '/sys/devices/pci0000:00/0000:00:14.0/usb1/>
nov 12 17:09:54 UB820 ModemManager[818]: <info> [base-manager] port cdc-wdm0
released by device '/sys/devices/pci0000:00/0000:00:14.0/usb1/1>
nov 12 17:09:54 UB820 ModemManager[818]: <info> [base-manager] port wwan0
released by device '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-3'
nov 12 17:09:54 UB820 ModemManager[818]: <info> [base-manager] couldn't check
support for device '/sys/devices/pci0000:00/0000:00:14.0/usb1/
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https://bugs.launchpad.net/bugs/1950385
Title:
HP lt4120 Snapdragon X5 LTE USB modem not working since 5.10 kernel
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