According to the policies in place for ModemManager in /etc/dbus-1/system.d/org.freedesktop.ModemManager1.conf it looks like only root can really do something. Assuming this is right, then I'm wondering why GNOME Control Center tries to directly access ModemManager instead of going via NetworkManager ?
At least that is what I am wondering from the error in message #1 from `(uid=1000 pid=49211 comm="gnome-control-center " label="unconfined")` ** Summary changed: - NetworkManager cannot connect to ModemManager with "org.freedesktop.DBus.Error.AccessDenied" + GNOME Control Center cannot connect to ModemManager with "org.freedesktop.DBus.Error.AccessDenied" ** Bug watch added: gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues #402 https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/402 -- 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/1946481 Title: GNOME Control Center cannot connect to ModemManager with "org.freedesktop.DBus.Error.AccessDenied" Status in modemmanager package in Ubuntu: New Bug description: Upgraded my laptop (ThinkPad P14s Gen2) from 21.04 to 21.10, trying to get access to Modem Manager fails with: > error: couldn't create manager: GDBus.Error:org.freedesktop.DBus.Error.AccessDenied This was working on 21.04. STR: - Open Settings, go to "Network" OR - mmcli -m 0 Running mmcli as root workaround the problem, but I'm not able to use network applet to connect my modem. > $ id uid=1000(alex) gid=1000(alex) groupes=1000(alex),4(adm),6(disk),20(dialout),24(cdrom),27(sudo),30(dip),44(video),46(plugdev),107(lpadmin),124(sambashare),137(libvirtd),155(docker) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1946481/+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
