mate-extra/mate-screensaver need schema form mate-base/mate-session-manager package in order to start. Without this schema, mate-base/mate-session-manager provide this error text:
(mate-screensaver:2254): GLib-GIO-ERROR **: Settings schema 'org.mate.session' is not installed
I know, this is sound a bit strange, but I use it with XFCE and did not have mate-base/mate-session-manager installed by mate-base/mate meta package.
Please, add as runtime dependencies mate-base/mate-session-manager.
author Amy Winston <firstname.lastname@example.org> 2015-12-31 10:02:54 (GMT)
committer Amy Winston <email@example.com> 2015-12-31 10:02:54 (GMT)
mate-extra/mate-screensaver: dependency for session manager added bug #561778.