It turns out that this actually regressed some qualcomm modems because modem-manager started to use some special netlink sockets that were not enabled in the 5.4 kernel.
To have that we need (see LP: #1998194): CONFIG_QRTR=m CONFIG_QRTR_SMD=m CONFIG_QRTR_TUN=m CONFIG_QRTR_MHI=m in the 5.4 kernel. However, this might not be easy according to some discussion I had. Would it be possible to revisit this backport? -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to modemmanager in Ubuntu. https://bugs.launchpad.net/bugs/1965901 Title: SRU the new 1.18 serie to focal for hwe Status in libmbim package in Ubuntu: Fix Released Status in libqmi package in Ubuntu: Fix Released Status in modemmanager package in Ubuntu: Fix Released Status in libmbim source package in Focal: Fix Released Status in libqmi source package in Focal: Fix Released Status in modemmanager source package in Focal: Fix Released Bug description: [Impact] We want to update to the newer serie for better hardware support (support for Quectel EM120R-GL and EM160R-GL) [Test Plan] * install modemmanager, libmbim, and libqmi from -proposed * reboot and try WWAN function to see if any regression there. * perform general dogfooding of its reverse dependencies (network- manager, gnome-control-center etc.) [Where problems could occur] The new version no longer automatically performs the FCC unlock procedure by default, see details on https://modemmanager.org/docs/modemmanager/fcc-unlock/ It means some modem will stop working out of the box. Users can manually install the unlock utility as described in the "FCC unlock procedures in ModemManager >= 1.18.4" section in the page above. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libmbim/+bug/1965901/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
