Bug#370692:

[Steve Fosdick]

The latest problem with DPMS not being activated as reported in my last
message only occurs inside GNOME (DPMS activates correctly from the gdm
login screen) and occurs when gnome-power-manager 2.24.4 is used with:

gnome-screensaver: 2.26.1-2
gnome-session:     2.26.2-1

Upgrading to gnome-power-manager 2.26.3 (from experimental) including
the packages on which it depends fixes the problem.

This is the second time a version mismatch of gnome-power-manager with
other parts of gnome has caused it to stop working so it seems there is
a missing version dependency (or conflicts).