[Bug 1332945] [NEW] Screen brightness keys don't function in KDE desktop

[Erno Kuusela]

Public bug reported:

My laptop's brightness adjustment keys (fn+arrows) don't work in Kubuntu
session, they worked in Unity.

xev shows the keys send correct sounding keysyms (XF86MonBrightnessDown
/ Up), but they neither show the OSD effect of brightness adjustment nor
do they have any effect on brightness.

Other fn key combinations work, eg. volume adjustment, mute, trackpad
disable, suspend.

I can use the xbacklight command to change the brightness, and then OSD
appears showing the new brightness setting.

I can use the brightness slider in the power saving settings and the
brightness changes when I click apply.

In the global keyboard shortcuts settings, the key binding shows
correctly: Under KDE Daemon, it shows "Increase Screen Brightness" is
associated with the "Monitor Brightness Up" key.

Ubuntu version info:

Description:    Ubuntu 14.04 LTS
Release:        14.04

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: kubuntu-desktop 1.308.1
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: KDE
Date: Sun Jun 22 14:04:01 2014
InstallationDate: Installed on 2013-10-02 (262 days ago)
InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
SourcePackage: kubuntu-meta
UpgradeStatus: Upgraded to trusty on 2014-06-19 (2 days ago)

** Affects: kubuntu-meta (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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Title:
  Screen brightness keys don't function in KDE desktop

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