Dead keys on Firefox Kubuntu 15.04

Solution 1:

I was able to make it work by permanently disabling IBus with the following command (based on this answer):

im-config -n xim

Not sure whether IBus should be the default input method or not in new Kubuntu/KDE. So I don't know if this is more workaround or an actual fix (and IBus should not be used at all). Would be nice if someone with more in-depth knowledge can comment on that.

You can get rid of ibus package completely by sudo apt-get remove ibus (see comments).

Solution 2:

Try the code im-config -l, if it shows problems setting LC_ALL, put this in your /etc/invironment file:

LC_ALL=en_US.UTF-8
LANG=en_US.UTF-8

according with your locale.

Reboot and LibreOffice should now process dead keys.