Comment # 15 on bug 1091816 from Freek de Kruijf

(In reply to Fabian Vogt from comment #14)
> (In reply to Freek de Kruijf from comment #13)
> > LayoutList=
> 
> ^
> This seems to be the issue.
> Can you try to set "us(international)" manually here and relogin? I'm not
> sure whether that's the right value though.

I used systemsetting5 to enter a layout and now LayoutList shows:
LayoutList=us(intl)
Some looking around I found this file is where the keyboard layout is saved if
set by systemsettings5.

Will investigate somewhat further.