I have this problem on the newly installed: Linux Mint 17.1 Rebecca, kdebase-runtime 4.14.2
Bug: 178968 Unable to contact time server when the ntp daemon is running.
KDE’s time management is plain broken for me (Archlinux). So the only sane thing is to enable ntp and disable KDE’s time syncing.
Probably. We have no maintainer for kcm-clock. Also, with distributions switching to systemd, the complete clock setting stuff should be rewritten anyway. If you know someone who would be able to do it, please point them here.