Comment 148 for bug 221112

(In reply to comment #33)
> The solution posted in comment #27 disables the standard behaviour of the
> Right-Ctrl key. It is annoying for most users! (I first thought that my
> keyboard was broken).
>
> See the bug 1013881 in Ubuntu
> https://bugs.launchpad.net/ubuntu/+source/xkeyboard-config/+bug/1013881
>
> My opinion is that the right solution to solve the RhythmBox bug is to remove
> the line
> include "nbsp(level4nl)"
> not patching the keyboard with the ugly
> include "level5(rctrl_switch)"
>
> Maybe we can solve the nbsp handling as it is the problem.
>
> Which language has a successful keyboard that handles nbsp?

right ctrl is the standard access key for level 5+6 (just like right alt is for levels 3-4 and yes you'll find keyboards where right alt is the same as left alt and not alt gr)

See for example this:
https://upload.wikimedia.org/wikipedia/commons/d/d0/KB_Canadian_Multilingual_Standard_comment-en.svg

So you can not remove right ctrl use without lowering the layout level number, and if you do so people start emitting nbsp my mistake (that was the biggest source of complain for one of this layout ancestors)