I'm pretty new to Ubuntu, so question may seem stupid.
I have a module which used to work on my parents laptop. After several updates module no longer works, and I'm pretty sure, old kernel would solve the issue.
However, I can't rebuild module with dkms for an old 3.0.0-16 kernel, because there are no kernel sources. linux-headers-3.0.0 is NOT in the repository. However linux-image-3.0.0-generic still exists in the repo.
So where do I get headers for an old kernel?