Comment 76 for bug 1292398

I compared the gnome-settings-daemon.install file in the gnome-settings-daemon package from trusty with the utopic one and found some differences:

UTOPIC

etc/xdg/autostart
usr/lib/gnome-settings-daemon*
usr/share/dbus-1/services
usr/share/icons
usr/share/locale
usr/share/gnome-settings-daemon*
usr/share/polkit-1
debian/source_gnome-settings-daemon.py /usr/share/apport/package-hooks

TRUSTY

etc
usr/lib/gnome-settings-daemon*
usr/share/dbus-1
usr/share/icons
usr/share/locale
usr/share/gnome-settings-daemon
usr/share/polkit-1
debian/source_gnome-settings-daemon.py /usr/share/apport/package-hooks

Could that missing "/xdg/autostart" in the Trusty package be the problem ?

See
http://packages.ubuntu.com/source/utopic/gnome-settings-daemon
http://packages.ubuntu.com/source/trusty/gnome-settings-daemon