Bug 336221

When trying to open the Desktop Effects settings the content of the System Settings window freezes and it is not possible to configure desktop effects as can be seen in the picture: http://imagebin.ca/v/1PtUEsj4xSIl  - However it's possible to click the "Overview" button in the top left corner to get back.

The following output can be seen on the console when that happens:

~ ❯❯❯ systemsettings                                                                                                                                           ⏎
"Theme tree: (Oxygen)" 
Fontconfig warning: "/etc/fonts/conf.d/50-user.conf", line 14: reading configurations from ~/.fonts.conf is deprecated. please move it to /home/alex/.config/fontconfig/fonts.conf manually
Shortcut for KAction  "quit_action" "&Quit" set with QShortcut::setShortcut()! See KAction documentation. 
Shortcut for KAction  "options_configure" "Configure" set with QShortcut::setShortcut()! See KAction documentation. 
Shortcut for KAction  "searchText" "" set with QShortcut::setShortcut()! See KAction documentation. 
Shortcut for KAction  "help_contents" "System Settings &Handbook" set with QShortcut::setShortcut()! See KAction documentation. 
Shortcut for KAction  "help_whats_this" "What's &This?" set with QShortcut::setShortcut()! See KAction documentation. 
Trying to open ksycoca from "/home/alex/.cache/ksycoca5"
Shortcut for KAction  "go_back" "Overview" set with QShortcut::setShortcut()! See KAction documentation. 


file:///usr/share/kwincompositing/qml/main.qml:42:5: Type EffectView unavailable 
         EffectView{ 
         ^
file:///usr/share/kwincompositing/qml/EffectView.qml:155:27: Type Effect unavailable 
                     delegate: Effect{ 
                               ^
file:///usr/share/kwincompositing/qml/Effect.qml:124:13: Type Video unavailable 
                 Video { 
                 ^
file:///usr/share/kwincompositing/qml/Video.qml:24:1: module "QtMultimedia" is not installed 
     import QtMultimedia 5.0 as Multimedia 
     ^
QObject::connect: Cannot connect (null)::changed() to KWin::Compositing::EffectView::changed()
QObject::connect: Cannot connect (null)::implicitWidthChanged() to KWin::Compositing::EffectView::slotImplicitSizeChanged()
QObject::connect: Cannot connect (null)::implicitHeightChanged() to KWin::Compositing::EffectView::slotImplicitSizeChanged()


I'm using Kubuntu Utopic with Plasma 5 packages (Next PPA). 

System Settings
Version 4.97.0
Using KDE Frameworks 4.100.0

If you need any other information don't hesitate to ask.

Thank you, alex

Reproducible: Always

Steps to Reproduce:
1. Start "System Settings"
2. Click on "Desktop Effects"
Actual Results:  
Desktop Effects KCM is not displayed correctly

Expected Results:  
Desktop Effects KCM is displayed correctly and user is able to change its settings