FreeBSD Handbook 5.7. Desktop Environments (As of 30 Mar 2016) Section 5.7.1. GNOME describes how to add proc, dbus_enable: GNOME requires /proc to be mounted. Add this line to /etc/fstab to mount this file system automatically during system startup: proc /proc procfs rw 0 0 GNOME uses D-Bus and HAL for a message bus and hardware abstraction. These applications are automatically installed as dependencies of GNOME. Enable them in /etc/rc.conf so they will be started when the system boots: dbus_enable="YES" hald_enable="YES" I think that KDE requires this as well as it uses part of the GNOME Libary. I believe it was present in earlier versions but not in the current one. If you start KDE but do not have dbus enabled it exits with an error message. The KDE port also has dbus as a dependency.
A commit references this bug: Author: wblock Date: Wed Mar 30 21:19:09 UTC 2016 New revision: 48513 URL: https://svnweb.freebsd.org/changeset/doc/48513 Log: Add dbus and hal configuration settings for KDE. Careful viewers will note a strange similarity to the wording in the GNOME section. PR: 208397 Submitted by: Patrick Powell <papowell@astart.com> Changes: head/en_US.ISO8859-1/books/handbook/x11/chapter.xml
*** Bug 202790 has been marked as a duplicate of this bug. ***