KDE Plasma 6.6 Gets Three Years of LTS Support

KDE Plasma 6.6 is officially becoming a long-term support release, with three years of maintenance planned under a newly funded initiative that also extends beyond Plasma itself to KDE Frameworks 6.24 and the KDE Gear 25.12 apps collection.

The move is notable because KDE discontinued its previous Plasma LTS model last year. According to KDE developer Nate Graham, one main reason was that the old approach never amounted to full-stack long-term support. Plasma received selected backported fixes, but KDE Frameworks and Gear releases did not.

As a result, KDE extended the regular Plasma maintenance cycle from four to six months. There have been no Plasma 6 LTS releases so far. Plasma 6.6 now changes that by becoming the first release in the Plasma 6 series to receive dedicated long-term maintenance.

The effort is funded by Kubuntu Focus under the “Bullet-Proof KDE Initiative.” The company sponsors Techpaladin Software to work on bugs reported by Kubuntu 26.04 users instead of waiting for fixes developed elsewhere and selectively backporting them. Plasma 6.6 will remain open to bug reports throughout the three-year support period, with fixes developed and backported where appropriate.

Importantly, the same treatment will not stop at the desktop shell. Relevant fixes will also be backported to KDE Frameworks 6.24 and KDE Gear 25.12, the versions included with Kubuntu 26.04. This means the initiative covers essentially the entire KDE software stack shipped by the distribution instead of treating Plasma in isolation.

Kubuntu Focus is also funding extra continuous integration capacity operated by KDE e.V. to test changes made to these older branches. According to Graham, the additional CI resources exceed what is strictly required for the LTS effort, so other KDE development work should also benefit from faster testing.

Another important distinction is that the initiative is not limited to security updates. Regular bug fixes suitable for backporting will also be included, addressing a principal weakness of KDE’s previous LTS model.

The arrangement is largely a commercial initiative involving Kubuntu Focus and Techpaladin Software, although KDE e.V. has approved the project and will receive funding for the additional CI infrastructure.

Importantly, the resulting fixes are not restricted to Kubuntu Focus customers. Any Kubuntu 26.04 user will benefit, and other distributions are free to ship Plasma 6.6 and contribute fixes or backports of their own.

For Kubuntu 26.04 users, the result should be a significantly more stable KDE experience over the release’s lifetime. Kubuntu 24.04 previously benefited from landing on Plasma 5.27, which KDE maintained for an extended period during the transition to Plasma 6. This time, however, the support effort is broader, more structured, and planned from the outset for a three-year period.

For additional details, see Graham’s post.