https://bugzilla.gnome.org/show_bug.cgi?id=580562 seems like it is relevant, though hasn't seem much activity and the developers seem to be saying it should be filed against gnome-screensaver instead of gnome- power-manager.
** Bug watch added: GNOME Bug Tracker #580562 https://bugzilla.gnome.org/show_bug.cgi?id=580562 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to totem in Ubuntu. https://bugs.launchpad.net/bugs/819156 Title: regression: totem do not disables screensaver Status in “totem” package in Ubuntu: Confirmed Bug description: With ubuntu 11.10 totem can't disable screensaver, or may be dpms. This is regression for me, since previous version worked fine. I guess gnome screensaver api was changed. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: totem 3.0.1-0ubuntu2 ProcVersionSignature: Ubuntu 3.0.0-7.9-generic-pae 3.0.0 Uname: Linux 3.0.0-7-generic-pae i686 Architecture: i386 Date: Mon Aug 1 09:07:55 2011 InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha i386 (20110705.1) ProcEnviron: LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: totem UpgradeStatus: Upgraded to oneiric on 2011-07-31 (1 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/totem/+bug/819156/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp