HP Chromebook: Crouton-Xfce: Double-click action maximize
The double-click action can be set by opening the Settings dialog called “Window Manager”. Under the Advanced tab, if you scroll down to the last item which is Double-click action you can select shade, hide, maximize, fill or nothing.
You may have to unset then set, or…
Try changing the mouse double-click Time and Distance settings to see if that helps (Settings Manager -> Mouse and Touchpad -> Behavior). Perhaps the settings are too low and the double-click event doesn’t happen fast enough (or the mouse moves too much).
Changed from 250 > 350.