[Bug 1573755] Re: Compose and dead keys stopped working with XIM after upgrade to 16.04

[Harald W Griesshammer]

ubuntu 16.04 unity: find same problem that .XCompose with alt-right key
works in terminal and terminal-based applications (vi, yes I am that
old) -- but not in firefox, libreoffice, thunderbird, emacs, etc.

In my case, rm -f ~/.config/dconf/user did not work, nor did any of the
other tricks.

Maybe this sheds light on things: my Settings-> Language lists "IBus" as
keyboard input method, but ibus does not run on startup/login. Instead,
ibus-setup starts with message that demon is not running. And yes, I did
follow the proposed fix ("make IBus kbd input method in Languages") --
that did not help. However, after just starting ibus-setup and closing
it again, special characters suddenly work in all applications.

However, just starting ibus from terminal as ibus-daemon -d does not
work.

There are some ibus-setup messages on the terminal: 
/usr/share/ibus/setup/main.py:38: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk
/usr/share/ibus/setup/main.py:39: PyGIWarning: IBus was imported without specifying a version first. Use gi.require_version('IBus', '1.0') before import to ensure that the right version gets loaded.
  from gi.repository import IBus

Can that bring you closer to a solution?

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Title:
  Compose and dead keys stopped working with XIM after upgrade to 16.04

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