Eclipse shortcuts do not work ubuntu
<p>I have installed Eclipse Neon with C++ features on Ubuntu 16.04.</p>

<p>My problem is that some more unusual shortcuts do not work such as "copy lines" (ctrl+alt+down), or "move lines up" (alt+up), or autocomplete (ctrl+space) for example.
The others more usual like "ctrl+c" or "ctrl+f" or "ctrl+z" do work.</p>

<p>I have tried to restart eclipse, and even the computer. I have restored the defaults key bindings but they do not work anymore. I think they worked just few times at the beginning after installing eclipse.</p>

<p>I don't want to uninstall and then reinstall eclipse because it is not a good solution if I have to do that every time, it will be just bothering at will. While searching for solutions on Google, it seems it is a quite recurrent issue for eclipse, but there is never real answers for them.</p>

<p>Thank you in advance</p>