***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/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1950385 Title: HP lt4120 Snapdragon X5 LTE USB modem not working since 5.10 kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1950385/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs