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Welcome to the Kernel Debugging Frequently Asked Questions (FAQ), part of the overall Kernel/FAQ! The aim of this page is to provide an list of common questions that we get. We encourage you to update this document when something is missing so it becomes a core source of information for the project. Each question has its own page which are listed on the Kernel/FAQEdit page, which also contains guidance on editing the FAQ.

I have problems with my system how can I diagnose the issue?

There are a number of specific diagnosis guides for kernel related issues in the Kernel/Debugging guide. You should likely file a bug against the linux package in LaunchPad if you do no already have one. File a bug using the command below:

  • ubuntu-bug linux

Do we have upstream kernels for Ubuntu?

The kernel team does build upstream kernels for debugging use. These are built automatically as the upstream kernels release and published in the KernelTeam/MainlineBuilds archive.

Why do mainline kernel builds have a -<series> suffix?

Each mainline build is named by the base upstream version suffixed with an Ubuntu release name, 2.6.35-maverick. This tells us the upstream version which was built, and additionally which configuration was used to build it. This tells us which release is most compatible with the kernel as built. This does not prevent the kernel being used on other releases, though it is most likely to work correctly on the release it is build for, or earlier ones. The further away from your base kernel release you are the more likely that there will be an incompatible userspace interaction which will prevent them working for you.

Do mainline kernel builds include Ubuntu specific drivers?

By definition the mainline kernel builds are made from virgin unaltered mainline kernel sources and therefore do not, and should not, include any Ubuntu patches or drivers. There are also no binary drivers for these kernels.