Sorry, my response was about the open bug (which I had the same problem with). So again, to provide support to the others who ask, "How do we bind our switch workspace up key?" You may try this:
$ gsettings set org.gnome.desktop.wm.keybindings switch-to-workspace-up "['<Control><Alt>w']"
Sorry, my response was about the open bug (which I had the same problem with). So again, to provide support to the others who ask, "How do we bind our switch workspace up key?" You may try this:
$ gsettings set org.gnome. desktop. wm.keybindings switch- to-workspace- up "['<Control> <Alt>w' ]"
I didn't test it, but hopefully it works for you.