In TC4 kernel Amateur Radio (AX.25) networking is disabled. While most of the drivers can be moved to an extension it results a new kernel not only modules.
I kindly ask to enable it in next cut (4.1?) as it is done with mainstream distros, like OpenSuSe, Fedora, ..buntu, ... It doesn't increase kernel size just makes modules usable and safe. Custom kernel is not a real solution as it would make problem for ordinary users.