Are you using Kubuntu 21.04 Hirsute Hippo, our current Stable release? Or are you already running our development builds of the upcoming 21.10 Impish Indri?
However this is a beta release, and we should re-iterate the disclaimer from the upstream release announcement:
DISCLAIMER: This is beta software and is released for testing purposes. You are advised to NOT use Plasma 5.22 Beta in a production environment or as your daily desktop. If you do install Plasma 5.22 Beta, you must be prepared to encounter (and report to the creators) bugs that may interfere with your day-to-day use of your computer.https://kde.org/announcements/plasma/5/5.21.90
If you are prepared to test, then…..
Add the beta PPA and then upgrade:
sudo add-apt-repository ppa:kubuntu-ppa/beta && sudo apt full-upgrade -y
In case of issues, testers should be prepared to use ppa-purge to remove the PPA and revert/downgrade packages.
Kubuntu is part of the KDE community, so this testing will benefit both Kubuntu as well as upstream KDE Plasma software, which is used by many other distributions too.
- If you believe you might have found a packaging bug, you can use a launchpad.net to post testing feedback to the Kubuntu team as a bug, or give feedback on IRC , or mailing lists .
- If you believe you have found a bug in the underlying software, then bugs.kde.org is the best place to file your bug report.
* General tests:
– Does plasma desktop start as normal with no apparent regressions over 5.21?
– General workflow – testers should carry out their normal tasks, using the plasma features they normally do, and test common subsystems such as audio, settings changes, compositing, desktop affects, suspend etc.
* Specific tests:
– Check the changelog:
– Identify items with front/user facing changes capable of specific testing.
– Test the ‘fixed’ functionality or ‘new’ feature.
Testing may involve some technical set up to do, so while you do not need to be a highly advanced K/Ubuntu user, some proficiently in apt-based package management is advisable.
Testing is very important to the quality of the software Ubuntu and Kubuntu developers package and release.
We need your help to get this important beta release in shape for Kubuntu and the KDE community as a whole.
Please stop by the Kubuntu-devel IRC channel if you need clarification of any of the steps to follow.
 – irc://irc.freenode.net/kubuntu-devel
 – https://lists.ubuntu.com/mailman/listinfo/kubuntu-devel