[Bug 1806321] [NEW] Multimedia play/pause, skip forward, skip back keys not working

[Christopher Snowhill]

Public bug reported:

Ever since I recently installed Kubuntu 18.10, using debootstrap and
`apt install kubuntu-desktop` method, upon reaching a desktop, the
multimedia keys on my Apple Wireless Keyboard do not have any effect on
anything.

The F3/Exposé key correctly triggers the window display mode, F10/Mute
toggles the sound mute, F11 and F12 correctly adjust the master volume
level.

F7, F8, and F9 have no multimedia control effect. Running `sudo showkey
-k` shows keycodes 165, 164, and 163 for the three keys, respectively.
`xev` does not report any media key activity for any of those three
keys, just focus in/out events on key down or up.

lsb_release -rd:
Description:    Ubuntu 18.10
Release:        18.10

plasma-desktop:
  Installed: 4:5.13.5-1ubuntu4
  Candidate: 4:5.13.5-1ubuntu4
  Version table:
 *** 4:5.13.5-1ubuntu4 500
        500 http://us.archive.ubuntu.com/ubuntu cosmic/universe amd64 Packages
        100 /var/lib/dpkg/status

I expected the multimedia play/pause, forward, and backward keys to
control the current application appearing in the KDE/Plasma desktop
integration for sound control.

Currently, they have no control over any applications, whatsoever.

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: plasma-desktop 4:5.13.5-1ubuntu4
ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
Uname: Linux 4.18.0-11-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
CurrentDesktop: KDE
Date: Sun Dec  2 19:49:28 2018
SourcePackage: plasma-desktop
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.logrotate.d.apport: 2018-12-02T17:13:49.953026

** Affects: plasma-desktop (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug cosmic

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Title:
  Multimedia play/pause, skip forward, skip back keys not working

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