Edit: Due to the fact that this article is old, the installation instructions may not work anymore. In order to successfully install the latest version of KDE Plasma, please access the KDE tag and open the latest article (the one on top).

The latest installation instructions for KDE Plasma
Hello Linux Geeksters. As you may know, KDE Plasma 5 has been released a while ago, being created in Qt5 and KDE Frameworks 5.
KDE Plasma 5 comes with many important apps ported in Qt5, the new Kicker Menu, a new default theme called Breeze and new wallpapers, new monochrome icons, support for hardware acceleration via OpenGL and OpenGL ES, an updated KDM (KDE display manager) and an enhanced lockscreen, among other changes implemented.
Recently, the first maintenance release of KDE 5 (KDE 5.1.1) has been recently released, coming with a huge list of changes:
- Limiting indexing word size in Baloo.
- Don’t index dots in Baloo, it’s a regular expression character
- Breeze: Do not takeout margins from toolbutton before rendering text
- Breeze: cleanup tab buttons positioning
- Breeze: Fix positioning of cornerwidgets
- Notes widget: Make text color white on black note
- Clock widget: Fix fuzzy clock saying half past seven when it’s half past six
- khotkeys: fix loading configuration
- kinfocenter: Set the correct version
- kcm-effects: Use Loader for the Video Item
- Oxygen: margins and RTL fixes
- Plasma Desktop: Validate timezone name before setting
- Plasma Desktop: Backport settings made in the component chooser to kdelibs 4 applications
- Plasma Desktop: make kdelibs 4 apps react to icon theme change
- Plasma Desktop: Cleanup applet configuration scrollbar handling and fix glitching alternatives dialog
- Plasma Desktop: fix emptying the trash from the context menu
- Plasma Desktop: numberous bugfixes
- Plasma Workspace: Remove shutdown option from screen locker
In this article I will show you how to install KDE Plasma 5.1 on Kubuntu 14.04 Trusty Tahr, Kubuntu 14.10 Utopic Unicorn and Linux Mint 17 Qiana KDE .
KDE Plasma 5.1 is available for Ubuntu 14.04 and Linux Mint 17 KDE via the Neon PPA and for Kubuntu 14.10 via the Kubuntu Next PPA, so installing it is easy.
Follow the instructions for your system and architecture exactly, in order to get a successful installation.
How to install KDE Plasma 5.1.1 on Ubuntu 14.04 and Linux Mint 17 KDE:
$ sudo add-apt-repository ppa:neon/kf5
$ sudo apt-get update
$ sudo apt-get install project-neon5-session project-neon5-utils project-neon5-konsole project-neon5-breeze project-neon5-plasma-workspace-wallpapers
Optional, to remove the changes, do:
$ sudo apt-get install ppa-purge
$ sudo ppa-purge ppa:neon/kf5
How to install KDE Plasma 5 .1.1 on Ubuntu 14.10:
$ sudo apt-add-repository ppa:kubuntu-ppa/next
$ sudo apt-get update
$ sudo apt-get dist-upgrade
$ sudo apt-get install kubuntu-plasma5-desktop plasma-workspace-wallpapers
Optional, to remove the changes, do:
$ sudo apt-get install ppa-purge
$ sudo ppa-purge ppa:kubuntu-ppa/next