Screen power management is not disabled during video playback in XBMC

[noble]

Note: I am using the term screensaver here. As far as I can tell Ubuntu no longer has anything called a screensaver. I am using the term for when the screen goes black but is still on (a slight bit of backlight can still be seen). This usually precedes the screen actually going to sleep.

Since upgrading from 12.04 to 12.10, when I play a video in XBMC the screensaver will kick in and blank the screen during playback. Sometimes the screen goes black just for about half a second and then comes back, sometimes it stays off until I move the mouse. This did not happen in 12.04.

$ lsb_release -rd
Description: Ubuntu 12.10
Release: 12.10

$ apt-cache policy xbmc
xbmc:
  Installed: 2:11.0~git20120510.82388d5-1ubuntu2
  Candidate: 2:11.0~git20120510.82388d5-1ubuntu2
  Version table:
 *** 2:11.0~git20120510.82388d5-1ubuntu2 0
        500 http://us.archive.ubuntu.com/ubuntu/ quantal/universe amd64 Packages
        100 /var/lib/dpkg/status

What I expected to happen: During playback of video the screensaver and power management for the screen would be disabled.

What happened instead: During playback of video the screen went blank, sometimes for a short time, sometimes until moving the mouse.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xbmc 2:11.0~git20120510.82388d5-1ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7
Uname: Linux 3.5.0-19-generic x86_64
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
Date: Wed Dec 5 09:11:34 2012
EcryptfsInUse: Yes
InstallationDate: Installed on 2012-06-23 (165 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: xbmc
UpgradeStatus: Upgraded to quantal on 2012-11-30 (4 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.