Comment 5 for bug 1768844

We included numlockx because this is normally a desired feature for desktop usage. Unfortunately these sorts of settings are not well handled in X11, and there's not a consistent way to turn the behavior on or off. If the automatic numlock setting is bothering you, you can uninstall the numlockx package on your system.

Meanwhile, we should document this so users can more easily find the solution in the future. Adding xubuntu-docs as affected.