Screen doesn't turn off on Lenovo ThinkPad T420

[Oded Arbel]

In Oneiric, I've set the screen settings to turn the screen off after 2 minutes and lock after "screen turns off".

When the timer expires, the screen goes black but does not physically turn off as I'd expect

I'm also missing the option to set different timers for on AC power vs. on battery power.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gnome-power-manager 3.1.92-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic x86_64
ApportVersion: 1.23-0ubuntu1
Architecture: amd64
Date: Tue Sep 27 13:45:07 2011
GnomeSessionIdleInhibited: No
GnomeSessionInhibitors: None
GnomeSessionSuspendInhibited: No
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110921.2)
MachineType: LENOVO 41786VU
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-11-generic root=UUID=560dc946-59e3-4df6-85f2-82a2e7a92cd8 ro quiet splash vt.handoff=7
SourcePackage: gnome-power-manager
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/16/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 83ET60WW (1.30 )
dmi.board.asset.tag: Not Available
dmi.board.name: 41786VU
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr83ET60WW(1.30):bd06/16/2011:svnLENOVO:pn41786VU:pvrThinkPadT420:rvnLENOVO:rn41786VU:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 41786VU
dmi.product.version: ThinkPad T420
dmi.sys.vendor: LENOVO
gnome-power-bugreport: Error: [Errno 2] No such file or directory