Comment 5 for bug 1404468

It seems I've stumbled across a better workaround: this did work for a Ubuntu 14.04 Gnome and 14.04 Unity (which had Gnome Shell installed in parallel and was started into Gnome Shell).

I've selected German Neo 2 as first keyboard layout and plain German as second. After selecting Neo and rebooting, in the login-screen there are still only German and English available as layouts (didn't find a way to change that) - but after logging in, Neo is automatically selected, and all keys seem to work. Note that I've stayed away from switching to another layout since then as I guess that would make keys infunctional again.