Power Manager Ignores Settings, Turns Off Screen

[tdeering]

After a fresh install of Ubuntu 12.10 Quantal Quetzal 64-bit, gnome-power-manager ignores my setting to never turn off my screen. The screen automatically turns off after ~20 minutes of inactivity.

In System Settings > Brightness and Lock, my setting is "Turn screen off when inactive for: Never".

This problem did not occur in 12.04 Precise Pangolin.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: gnome-power-manager 3.6.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7
Uname: Linux 3.5.0-18-generic x86_64
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
Date: Sat Nov 17 12:38:46 2012
InstallationDate: Installed on 2012-11-05 (11 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-power-manager
UpgradeStatus: No upgrade log present (probably fresh install)