The interface was declared to take an unsigned integer instead
of a boolean, as gnome-screensaver does. Due to this,
gnome-screensaver-command --activate or --deactivate does not
work when used with gnome-shell.
https://bugzilla.gnome.org/show_bug.cgi?id=686063
<arg name="active" direction="out" type="b" />
</method>
<method name="SetActive">
- <arg name="value" direction="in" type="u" />
+ <arg name="value" direction="in" type="b" />
</method>
<signal name="ActiveChanged">
<arg name="new_value" type="b" />