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

Ubuntu has a shortcut Ctrl+Alt+Left/Right to navigate between workspaces. When i changed it under system settings, IDE is able to pick up the shortcut.