Dual monitor workspaces in Ubuntu 18.04

Dual monitor setup on Ubuntu 18.04; when I hit activities only the left monitor switches workspaces while the right monitor just keeps whatever is on its screen. Is there a way to make the workspace span both monitors so that when I switch from one workspace to another both monitors switch?

Solution 1:

Had the same problem. Turned out it was super easy to fix.

Install the GNOME Tweaks app. Go to Workspaces and set Display handling to Workspaces span displays. Done!

Solution 2:

You can change this behaviour by executing:

gsettings set org.gnome.mutter workspaces-only-on-primary false