IntelliJ Idea Ctrl+Alt+Left shortcut doesn't work in Ubuntu

Question

I am using IntelliJ Idea 2017.3 latest release in Ubuntu 2017.10 and shortcut Ctrl+Alt+Left/Right doesn\'t work.

Whereas from

Answer 1

The solution by @lászló-van-den-hoek here was correct, but I had to take one more step.

Go to File | Settings | Keymap in Intellij and change the Keymap from Default for GNOME to Default.

I think this has been tripping people up since Ubuntu switched from Unity desktop to a GNOME based desktop, and now Intellij is starting up with GNOME appropriate hotkeys.