I normally start my Eclipse Kepler from the command line in Ubuntu, which has worked fine for me for a long time. Today it shows the following error and is not getting started.
** (eclipse:11160): WARNING **: Command line `dbus-launch --autolaunch=51cd57f60dc1ddcceff7115600000007 --binary-syntax --close-stderr' exited with non-zero exit status 1: Autolaunch error: X11 initialization failed.\n