How can I stop gnome-control-center from breaking my keyboard?
The latest release of gnome-control-center contains an updated version of gnome-keyboard-properties which is even more hostile to a customised keyboard configuration.
The fundamental problem has not changed: I need to customise the standard keyboard layout configured in x.org (so far I have been using xmodmap), but GNOME will override any change done in ~/.xsession.
With the precedent version I was able to remove all configured layouts from the dialog (at the price of an annoying warning dialog at every login: #245460), but the new one helpfully forces me to have at least one valid layout.
So, what can I do to make my keyboard configuration GNOME-compatible? Bonus points if you know how to do this without root privileges (editing the xkb database is not a valid answer).