Dead keys not working in LibreOffice @ Kubuntu 16.04 LTS.

[Bas G. Roufs - in English]

Hello Everybody.

At a fresh install of Kubuntu 16.04 LTS along with KDE Plasma 5.6.5 (via the 
backports), I stumbled upon bug nr. 71437 at Bugzilla for LibreOffice:
https://bugs.documentfoundation.org/show_bug.cgi?id=71437

In one phrase: dead keys are not working in LibreOffice applications like writer 
or calc. I refer to LibreOffice version 5.1.4.2.  Dead keys DO work in ALL OTHER 
applications. I am using the keyboard "USA International". A character like ? 
is no problem in most of the applications. They same applies for e.g. the 
double quotation mark (") - the key that needs to be pressed first in order to 
get ?. However, in Libreoffice in my configuration as summarised here, signs like 
" and ? do not show up. I have similar problems with characters like ?, ?, ?, 
?. ?, etc. Also signs like `, ~ or ' do not show up in Writer or any other 
Libreoffice application. It does not matter whether I work in Dutch, English, 
Italian, French, German or whatever - the problem remains the same - however, 
as I said, just in LibreOffice. 

Of course, I have been looking for workarounds and fixes. The only workaround I 
found so far is copy-pasting from Kate, BlueFish or whatever other application 
into LibreOffice. This one did apparently not work for me:
http://askubuntu.com/questions/774237/dead-keys-accents-stopped-working-after-upgrading-to-ubuntu-16-04

Also this one seemingly does not work in my case, also not in an adapted way:
https://bugs.documentfoundation.org/show_bug.cgi?id=71437#c6

Do you know any other fix or workaround?

A more detailed report, I have been working out here:

https://bugs.documentfoundation.org/show_bug.cgi?id=71437#c25

And here:

https://bugs.launchpad.net/ubuntu/+source/gnome-terminal/+bug/1573755

Yours.

Bas G. Roufs.

-- 
Bas G. Roufs
Van 't Hoffstraat 1
NL- 3514 VT  Utrecht
BasRoufs at gmail.com
+31 6 446 835 10