Are kernels from Ubuntu Kernel PPA supported for the same time frame as the version they are intended for?

Solution 1:

If you're interested in stability assurance & tech support from Canonical, then a PPA kernel will definitely void that. In https://wiki.ubuntu.com/Kernel/MainlineBuilds they write:

"The mainline kernels builds are produced for debugging purposes and therefore come with no support. Use them at your own risk."

If you're talking about them continuing with updates, I'd guess they would try - the current LTS is going to have plenty of users, and they don't have to test that much since it's not officially supported. However, some future kernel could include changes that would make it incompatible with 10.04 and they may not bother fixing that.