Jonathan Riddell, the lead developer of the Kubuntu project, announced today that his work on the KDE-based Ubuntu variant will no longer be funded by Canonical after the upcoming 12.04 release. Kubuntu will be developed entirely by volunteers, much like other community-maintained variants of Ubuntu.

Riddell will continue to be employed by Canonical, but working on Kubuntu will be confined to his free time. In order for the Kubuntu project to continue operating, Riddell says that community members will have to take a more active role in doing unpopular tasks such as ISO testing.

"The practical changes are I won't be able to work on KDE bits in my work time after 12.04 and there won't be paid support for versions after 12.04," he wrote. "This is a rational business decision, Kubuntu has not been a business success after 7 years of trying, and it is unrealistic to expect it to continue to have financial resources put into it."

Riddell and the Kubuntu team have done extraordinary work over the years to make Kubuntu a competitive Linux distribution. The quality and maturity of the distro have risen sharply over the past few years—it now rivals the best KDE distributions and has displaced openSUSE as our preferred environment for KDE testing. Although Kubuntu has managed to attract an audience, it has never been a commercially successful product for Canonical.

KDE's underlying Qt toolkit was recently added to the default Ubuntu installation. There are a lot of areas where Qt's integration with the rest of the Ubuntu environment could potentially be improved. It makes sense for Canonical to work on making Qt a first-class citizen in Ubuntu rather than funding a KDE variant of the distribution.

Kubuntu users who want to join the development effort and participate in testing and maintaining the distribution can learn more about how to get involved at the project's website.