"loginctl kill-session" and "loginctl kill-user" commands always returns with an error message: Failed to issue method call: Input/output error
Looks like a dupe of upstream https://bugs.freedesktop.org/show_bug.cgi?id=71092
systemd-208-11.fc20 has been submitted as an update for Fedora 20. https://admin.fedoraproject.org/updates/systemd-208-11.fc20
systemd-208-11.fc20 works
Package systemd-208-11.fc20: * should fix your issue, * was pushed to the Fedora 20 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing systemd-208-11.fc20' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2014-0902/systemd-208-11.fc20 then log in and leave karma (feedback).
systemd-208-13.fc20 has been submitted as an update for Fedora 20. https://admin.fedoraproject.org/updates/systemd-208-13.fc20
systemd-208-14.fc20 has been submitted as an update for Fedora 20. https://admin.fedoraproject.org/updates/systemd-208-14.fc20
systemd-208-14.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.