Screen keeps reverting to fully dimmed state

[wdesmet]

I'm reporting this here because it is very similar to bug #872932, on different hardware (dell latitude e6510).

Ubuntu keeps dimming the screen, seemingly at random times. If I go into the options to "Brightness and Lock" it still shows the requested brightness level, but I have to change it to get back to that brightness level (by moving the slider or FN+brightness keys).

The option to "Dim screen to save power" is turned off. The problem occurs both when plugged in and when not.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gnome-settings-daemon 3.4.2-0ubuntu0.4
ProcVersionSignature: Ubuntu 3.2.0-30.48-generic 3.2.27
Uname: Linux 3.2.0-30-generic x86_64
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
Date: Mon Sep 3 18:50:26 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
SourcePackage: gnome-settings-daemon
UpgradeStatus: Upgraded to precise on 2012-06-11 (84 days ago)

[Launchpad Janitor (janitor)]

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