Put display to sleep when inactive does not work for external monitor

[Martin Wildam]

Binary package hint: gnome-power-manager

When I enable the option "Put display to sleep when inactive" (let's say put it to 10 minutes) then it does not work on my laptop (Dell E-5500) when put into docking station and connected (via HDMI cable) from there to an external monitor. The laptop lid is closed all the time and I solely work with the external monitor.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: gnome-power-manager 2.30.0-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.32-27.49-generic-pae 2.6.32.26+drm33.12
Uname: Linux 2.6.32-27-generic-pae i686
Architecture: i386
Date: Wed Jan 26 17:53:22 2011
ExecutablePath: /usr/bin/gnome-power-preferences
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GnomeSessionSuspendInhibited: No
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
MachineType: Dell Inc. Latitude E5500
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-27-generic-pae root=UUID=0c5230d6-05d2-47c8-9325-347fe42d71f9 ro quiet splash
ProcEnviron:
 LANGUAGE=en
 LC_TIME=en_DK.utf8
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: gnome-power-manager
dmi.bios.date: 04/15/2009
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A11
dmi.board.name: 0DW634
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA11:bd04/15/2009:svnDellInc.:pnLatitudeE5500:pvr:rvnDellInc.:rn0DW634:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude E5500
dmi.sys.vendor: Dell Inc.