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

My Gnome was configured to CTRL+ALT+left or right and I don't why but it moved to CTRL+ALT+Up or down. Workspaces were aligned horizontally and they changed to be vertical. I don't what I did to get this! Maybe the same thing happened to you...

I am fine with that, it changes a lit bit my desktop, changes are good some times...

I advice you to install the extension Workspace to dock which is very cool ;)