Please drop PackageKit.service from 90-default.preset for two reasons: 1) the service file is called packagekit.service (lower case) 2) packagekit.service doesn't have an [Install] section so the preset wouldn't actually do anything meaningful, even if it got the name right
kmod-18-4.fc21,systemd-216-7.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/kmod-18-4.fc21,systemd-216-7.fc21
kmod-18-4.fc21,systemd-216-9.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/kmod-18-4.fc21,systemd-216-9.fc21
kmod-18-4.fc21,systemd-216-10.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/kmod-18-4.fc21,systemd-216-10.fc21
Package kmod-18-4.fc21, systemd-216-10.fc21: * should fix your issue, * was pushed to the Fedora 21 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing kmod-18-4.fc21 systemd-216-10.fc21' as soon as you are able to, then reboot. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2014-14307/kmod-18-4.fc21,systemd-216-10.fc21 then log in and leave karma (feedback).
Package kmod-18-4.fc21, systemd-216-11.fc21: * should fix your issue, * was pushed to the Fedora 21 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing kmod-18-4.fc21 systemd-216-11.fc21' as soon as you are able to, then reboot. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2014-14307/kmod-18-4.fc21,systemd-216-11.fc21 then log in and leave karma (feedback).
kmod-18-4.fc21, systemd-216-11.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.