In Gnome you can run this command to change the "use_time_for_policy" state:
gconftool-2 --type=bool --set /apps/gnome-power-manager/use_time_for_policy false
In Gnome you can run this command to change the "use_time_ for_policy" state:
gconftool-2 --type=bool --set
/apps/ gnome-power- manager/ use_time_ for_policy false