journalctl -b | grep -i modem yields *many* of these lines Apr 25 12:10:18 e6510 dbus-daemon[254]: dbus[254]: [system] Activation via systemd failed for unit 'dbus-org.freedesktop.ModemManager1.service': Unit dbus-org.freedesktop.ModemManager1.service failed to load: No such file or directory. Apr 25 12:10:18 e6510 dbus[254]: [system] Activation via systemd failed for unit 'dbus-org.freedesktop.ModemManager1.service': Unit dbus-org.freedesktop.ModemManager1.service failed to load: No such file or directory.
I do have a (cable) modem, but presumably that is not visible to the system since the modem is behind a (linksys) router. I can't simply --depclean modemmanager since gnome-control-center-3.10.3 requires it and the ebuild contains # FIXME: modemmanager is not optional thanks, allan