I know that since 11.04 the keyboard short-cut of Ctrl+Alt+Backspace has been disabled by default. However at least as recently as 12.04 you were able to enable it via the Keyboard GUI:
The Keyboard options in 14.04 are much more limited and there appears to be no way to re-enable this function:
Is there any way to re-enable this function? All my searches of AU as well as a full internet search have provided no workable answers for 14.04.
