Warning: 14.04 LTS to 16.04 LTS upgrades are problematic, and should not be attempted by the average user. Please install a fresh copy of 16.04.1 instead. To prevent messages about upgrading, change Prompt=lts with Prompt=normal or Prompt=never in the /etc/update-manager/release-upgrades file.

See the 16.04.1 release announcement.

Download 16.04.1 images.

This is the first release from the team since we became a completely volunteer group, just after the release of 15.10. Delivering an Long-Term Release (LTS) release is a superb achievement, and testimony to our community’s commitment to Ubuntu and KDE.

Beta-tester feedback has been resounding and positive. This confirms the amazing work that is being undertaken by our upstream KDE community. Plasma 5, KDE Frameworks 5 and all of KDE continue to demonstrate how Free/Libre Open Source Software sets world class standards for innovation, usability and integration.

What can you expect from this latest release?

Our new software center: Plasma Discover brim-full of software to choose from.

The latest KDE PIM with lots of features and fixes Including the latest Akonadi support and integration with MySQL 5.7.

Plasma 5, the next generation of KDE’s desktop has been rewritten to make it smoother to use while retaining the familiar setup.

Kubuntu 16.04 comes with KDE Applications 15.12 containing all your favourite apps from KDE, including Dolphin. Even more applications have been ported to KDE Frameworks 5 but those which aren’t, should fit in seamlessly. For a complete desktop suite of applications we’ve included some non-KDE applications such as LibreOffice 5.1 and Firefox 45.

Keen developer types and friends of Muon Package Manager will be delighted to know that the project has got a new team of maintainers, and a new release just in time for this Kubuntu LTS.

What are you waiting for? Download the ISO from our downloads section, or upgrade now from 15.10!

Warning: 14.04 LTS to 16.04 LTS upgrade is currently problematic and should not be attempted by the average user. Please install a fresh copy of 16.04.1 instead. To prevent messages about upgrading, change Prompt=lts to Prompt=normal or Prompt=never in the /etc/update-manager/release-upgrades file.

The Kubuntu Podcast team will be reviewing the latest release, and discussing feedback from the community on the next show. More details available in the podcast section.

Please also check out our release notes.

We are preparing Kubuntu Xenial Xerus (16.04 LTS) for distribution on April 21, 2016. With this Beta 2 pre-release, you can see what we are trying out in preparation for our next stable version. We would love to get some testing by our users.

Plasma 5, the next generation of KDE’s desktop has been rewritten to make it smoother to use while retaining the familiar setup. The fifth set of updates to Plasma 5 is the default in this version of Kubuntu. Plasma 5.6 should be available in backports soon after release of the LTS.

Kubuntu comes with KDE Applications 15.12 containing all your favorite apps from KDE, including Dolphin. Even more applications have been ported to KDE Frameworks 5 but those which aren’t should fit in seamlessly. Non-KDE applications include LibreOffice 5.1 and Firefox 45.

Please see Release Notes for more details, where to download, and known problems. We welcome help to fix those final issues; please join the Kubuntu-Devel mail list[1], just hop into #kubuntu-devel on freenode to connect with us.

1. Kubuntu-devel mail list: https://lists.ubuntu.com/mailman/listinfo/kubuntu-devel

See the 14.04.3 release announcement.

Download 14.04.3 images.

See the 14.04.2 release announcement.

Download 14.04.2 images.

See the 14.04.1 release announcement.

Download 14.04.1 images.

The Kubuntu community is proud to announce the release of 12.04 LTS, the Precise Pangolin: the new Long Term Support version of our friendly operating system.

See the Kubuntu 12.04 LTS Release Notes for a technical description including known issues.

Built on Ubuntu’s core and polished with KDE’s applications and workspaces, Kubuntu 12.04 LTS is a grand example of friendly, fast and beautiful software. We recommend it as the perfect OS for casual users, students, Linux gamers, software developers, professionals, and anyone interested in a free, open platform that is both beautiful and useful.

Getting Kubuntu 12.04 LTS

Upgrading from Previous Versions

Direct upgrades to 12.04 are only possible from 10.04 LTS and 11.10.

• Upgrade from 10.04 LTS
• Upgrade from 11.10

Download a Disk Image

Download an image.

Instructions for burning the image to a CD/DVD or USB flash drive can be found on the Burning ISO Howto.

We recommend you learn how to check your CD image so your pre-release is as its supposed to be. Compare your MD5 checksum with the correct ones found alongside the CD images.

12.04 LTS Highlights – Updates from the KDE community

Plasma and Applications 4.8

The latest stable release of KDE’s Plasma Workspaces and Applications brings new features and improvements all around. Highlights include :

• Improvements in speed and rendering in Dolphin
• Redesigned power management configuration – settings are now Activity-aware
• New Icon Tasks provides an alternative icon-only taskbar

For more details see the Plasma 4.8 and KDE Apps 4.8 release pages.

Amarok 2.5

This new and improved version of the default music player features re-written USB mass storage support, native support for remote NFS & SMB/CIFS collections, GPodder.net podcast synchronisation and an integrated Amazon MP3 store.

For more information have a look at the release announcement for Amarok.

Rekonq and OwnCloud Updates

The WebKit based browser Rekonq has been updated to make it faster and more stable.

The OwnCloud self-hosting cloud solution has also had a major upgrade with slicker UI and more apps such as a streaming music player.

12.04 LTS – New from Kubuntu

Software Center and Updater

Our Muon update tool has had a lot of improvements. Updates are split up into three sections for easier browsing. A changelog viewer allows you to examine what is new. During update installation, a progress bar shows download and installation progress.

Our Muon Software Center has improvements including warning when an application removal will remove other packages and a more friendly screenshot viewer.

More details on Muon 1.3.0 blog post by the author Jonathan Thomas.

New Applications Available

We have provided some new and interesting software for use.

Calligra Suite

A new life for the old KOffice suite brings the document and creativity suite to a new audience. Now features top MS Office file import filters.

Calligra comes with the DVD images and is available from Muon Software Center.

KDE Telepathy

Instant Messaging has changed and so has our software with Telepathy KDE. You can easily set it up to talk on GTalk or Facebook as well as MSN and many other protocols.

KDE Telepathy is available from Muon Software Center.

Kubuntu Active Technology Preview

Kubuntu Active is a new Ubuntu flavour for tablets. It uses Plasma Active and the new UIs designed for tablets. This preview release is currently available for i386 only at this time, as an image to put on USB keys.

Download Kubuntu Active Technology Preview.

Known Problems

• kmix is crashing after multiple volume changes
• kactivitymanagerd crashes on login
• Akonadi contact resource wrong defaults
• Akonadi mail filter fails after configuration corrupted
• Kubuntu amd64+mac crash in manual partitioner
• KMail2 Akonadi transition instructions
• Not possible to enter password for a new user in KDM see release notes for workaround.

See more known problems on the release notes

Feedback

We want to hear your opinions about Kubuntu 12.04 LTS

• Do we [Ama]rok?
• Did a feature make or break your day?
• What do you flat-out dislike?

Take a look at the Ubuntu Code of Conduct, try Kubuntu 12.04 LTS and head on over to the Feedback Page. Your input is an invaluable resource, so do take the time to write down your thoughts and let us know what you think.