I installed kernel x.y.z and package foo doesn work anymore, what should I do?
• (RRR) Check out the /usr/src/linux/Documentation/Changes and make sure you have the recommended versions (or newer) of the relevant software. This is very important. A lot of things are evolving on Linux and newer versions of the kernel may break older packages (especially on the development kernels). If you are using development kernels keep an eye for reports on the kernel list. If all else fails post a bug report (see Q/A on bug reports) to the list.