Ubuntu 9.04, the next Linux operating system release due out by Canonical in April, will not be shipping with the Linux 2.6.29 kernel like many had hoped for. The feature freeze for the Jaunty Jackalope is not until next week and the Linux 2.6.29 kernel will certainly be released by April (right now it's at -rc4 stage), but Canonical's kernel team has decided to stick with using the current Linux 2.6.28 stable series.