The log has errors like boltd[712]: /usr/libexec/boltd: symbol lookup error: /usr/libexec/boltd: undefined symbol: g_log_structured_standard
could you share the output of $ ldd -r /usr/libexec/boltd it sounds like an old version of glib has been installed taking of the ubuntu version? ** Changed in: modemmanager (Ubuntu) Status: Confirmed => Incomplete -- 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/1961859 Title: When we install ModemManager1.16.6 and others, this will lead to ubuntu can not enter into GNOME UI. Status in modemmanager package in Ubuntu: Incomplete Bug description: 1. We use sourcecode to install ModemManger1.16.6 2. Ubuntu can not enter UI. 3. We capture log and picture and add these on the attachment. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1961859/+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