Kubuntu
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Introduction
These release notes for Kubuntu 25.04 (Plucky Puffin) provide an overview of the release and document the known issues.
Support lifespan
Kubuntu 25.04 will be supported for 9 Months.
Getting Kubuntu 25.04
Upgrading from 24.10
Detailed upgrade instructions can be found here: https://help.ubuntu.com/community/PluckyUpgrades/Kubuntu
Download a Disk Image
Download a Bootable image. Direct downloads, torrents, and zysnc are available as options.
New features and changes in 25.04
Details of the changes in the Ubuntu base, including kernel, toolchain and build options can be found in the main Ubuntu Release Notes.
Kubuntu core desktop and applications
Plasma 6.3
The Kubuntu team have been working hard to ship 25.04 with the latest Qt6 based Plasma 6.3 KDE desktop.
Included is Plasma 6.3.4 which is the 4th and latest bugfix release of Plasma 6.3. New features in 6.3 can read here.
Plasma Wayland session
Plasma wayland session is the default option in sddm (display manager login screen). An X11 session can be selected instead if desired. The last used session type will be remembered, so you do not have to switch type on each login.
Qt and KDE Frameworks
Kubuntu 25.04 ships with Qt6 6.8.3 and KDE Frameworks 6 version 6.12.0.
For applications that are still based on Qt5/KF5, Qt5 5.15.15 and Frameworks 5.116.0 are still in the archive.
KDE Applications updates
All KDE gear currently packaged by Ubuntu or Debian are now at the current latest 24.12.3.
Many other KDE applications have been updated.
Web browser and office suite
Firefox 137 snap is the default browser from the Snap Store.
LibreOffice 25.2 is provided by default in the full installation.
Kernel
Kubuntu 25.04 ships with the 6.14 Linux kernel.
Known issues
Flatpaks
To enable Flatpaks in KDE’s Discover in Kubuntu 25.04, run this command:
sudo apt install flatpak plasma-discover-backend-flatpak
To enable the largest Flatpak repository, run this command:
flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
Log out and log back in (or restart) to re-initialize the XDG_DATA_DIRS variable, otherwise, newly installed Flatpak apps will not run or appear in the startup menu.
Installer and live session
2107539 Kubuntu plucky OEM install restarts to white screen instead of end user setup (please check back for possible workarounds)
Other issues
Feedback
Development of Kubuntu 25.04, Plucky Puffin Oriole, is ongoing and bugs are fixed every day. Before reporting bugs, please ensure your system is up to date. For verifying installation related bugs, updated disk images are available from Daily bootable images for standard PCs and laptops.
PluckyPuffin/ReleaseNotes/Kubuntu (last edited 2025-04-17 13:16:26 by rikmills)