> org.gnome.desktop.wm.preferences action-middle-click-titlebar 'lower'
I wonder if the system thinks you are middle clicking somehow. Try:
gsettings set org.gnome.desktop.wm.preferences action-middle-click-titlebar 'toggle-maximize-vertically'
> org.gnome.desktop.wm.keybindings lower ['disabled']
This doesn't look like a valid setting. In case this is causing confusion try clearing it with:
gsettings set org.gnome.desktop.wm.keybindings lower "[]"
> org.gnome. desktop. wm.preferences action- middle- click-titlebar 'lower'
I wonder if the system thinks you are middle clicking somehow. Try:
gsettings set org.gnome. desktop. wm.preferences action- middle- click-titlebar 'toggle- maximize- vertically'
> org.gnome. desktop. wm.keybindings lower ['disabled']
This doesn't look like a valid setting. In case this is causing confusion try clearing it with:
gsettings set org.gnome. desktop. wm.keybindings lower "[]"