Along with the many changes which we saw in Ubuntu 11.04 Natty, the overlay scrollbar was perhaps one of the most distasteful ones. While some users might find it convenient to auto-hide the scrollbar, yet some of us just can’t seem to get used to it. Moreover, the overlay scrollbar also seems to be a bit buggy as it sometimes fails to show up at all. If for some reason you want to get the old scrollbar back in Ubuntu 11.04, here is a small tip that will come handy.
To get the classic scrollbar back, open Synaptic Package Manager and search for the package liboverlay-scrollbar. Once found, remove the package via right-click context menu. Restart your system for the changes to take effect.
This will give you the classic scrollbar (as shown in the screenshot below).
Note: Make sure you backup your system or save the package details for re-installation purposes and to undo the changes (if required) to avoid any undesirable effects.