Public bug reported:

On my laptop (acer aspire one V5-131) which uses Ubuntu 13.04, the
change of the brightness settings have no effect on the brightness in
the settings application.

When I press the shortcut for changing the brightness (Fn+Left &
Fn+Right), the notification of the new brightness level is correctly
displayed but again it has no effect on the brightness of the screen
(and it neither update the level in the settings application).

Please, see in the attached file (Brightness.txt)  what I do for
changing the brightness on my computer from the console.

I don't know anything about the settings software stack but since it
works from the console I don't think it is a driver problem but rather a
software problem somewhere or maybe a missing symlink. Though the
keyboard shortcut are not working properly, the problem could also be
below gnome-control-center.

Please contact me for any question or if I can be of any help for the
correction.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: gnome-control-center 1:3.6.3-0ubuntu24.1
ProcVersionSignature: Ubuntu 3.8.0-33.48-generic 3.8.13.11
Uname: Linux 3.8.0-33-generic i686
ApportVersion: 2.9.2-0ubuntu8.5
Architecture: i386
Date: Sun Nov 24 07:39:09 2013
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/gnome-control-center
InstallationDate: Installed on 2013-06-10 (166 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release i386 (20130424)
MarkForUpload: True
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
usr_lib_gnome-control-center:
 deja-dup                    26.0-0ubuntu1
 gnome-control-center-signon 0.1.6bzr13.04.05-0ubuntu1.1
 gnome-control-center-unity  1.3daily13.06.19~13.04-0ubuntu1
 indicator-datetime          12.10.3daily13.03.26-0ubuntu1

** Affects: gnome-control-center (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 raring

** Attachment added: "Change the brigtness from the console."
   
https://bugs.launchpad.net/bugs/1254376/+attachment/3915713/+files/Brightness.txt

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https://bugs.launchpad.net/bugs/1254376

Title:
  Brightness settings changes have no effect.

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