When I move my laptop from place to place and switching on and off a second monitor. my workspace seems to mess up easily: I could not be able to bring up some terminal or browser window.
At first I thought these must have crashed, but now realize they are just in different workspaces. But I'm not able to switch to them. CTL+ALT + TAB should be able to do that, but it doesn't stay on. As soon as I hit ENTER key or mouse button the selected window just disappears. Nor do I see an "activities overview" anywhere on my screen.
What am I missing? I have Ubuntu 16.04 on a Lenovo T450s laptop. Everything else is fine.
thanks for any insight!