brightness control breaks after 13.04 -> 13.10 upgrade on lenovo e325

[Sami Sieranoja]

After upgrading from 13.04 to 13.10 brightness control on unity no longer works. When pressing the brightness control keys, the brightness "progress bar" is shown, but the change has usually no effect.

Sometimes it does change to from 100% brightness to very dim (0%?), but doesn't change back. Usually it has no effect. In 13.04 it worked fine.

This is very similar problem with these bugs:
https://bugs.launchpad.net/ubuntu/+bug/1245288
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1249219

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: gnome-control-center 1:3.6.3-0ubuntu45.2
ProcVersionSignature: Ubuntu 3.11.0-17.31-generic 3.11.10.3
Uname: Linux 3.11.0-17-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
Date: Sun Mar 2 16:40:03 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2012-06-02 (638 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
SourcePackage: gnome-control-center
UpgradeStatus: Upgraded to saucy on 2014-02-28 (1 days ago)
usr_lib_gnome-control-center:
 activity-log-manager 0.9.7-0ubuntu4
 deja-dup 27.3.1-0ubuntu1
 gnome-control-center-datetime 13.10.0+13.10.20131023.2-0ubuntu1
 gnome-control-center-signon 0.1.7~+13.10.20130724.1-0ubuntu1
 gnome-control-center-unity 1.3+13.10.20131004-0ubuntu1