/usr/share/dbus-1/system-services/org.kde.powerdevil.backlighthelper.service is in kde-workspace-data 4:4.8.2a-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | [D-BUS Service]
Name=org.kde.powerdevil.backlighthelper
Exec=/usr/lib/kde4/libexec/backlighthelper
User=root
|