title: IntelliJ Idea Ctrl+Alt+Left shortcut doesn't work in Ubuntu
body: <p>I am using IntelliJ Idea 2017.3 latest release in Ubuntu 2017.10 and shortcut <kbd>Ctrl</kbd>+<kbd>Alt</kbd>+<kbd>Left</kbd>/<kbd>Right</kbd> doesn't work.</p>
  
  <p>Whereas from menu Navigate -> Back/Forward works fine.</p>
  
  <p>Reference : <a href="https://www.jetbrains.com/help/idea/navigation-in-source-code.html" rel="noreferrer">https://www.jetbrains.com/help/idea/navigation-in-source-code.html</a></p>