This question is pretty much a duplicate of this question. However I'm starting this question, because all the answers in the other question seem to focus on how to setup a custom shortcut for gnome-system-monitor, while the actual question is why does it not work?
That is I make a custom shortcut to launch gnome-system-monitor
. I make sure that the System Log out is disabled (which is ctrl+alt+del by default). When I bind the gnome-system-monitor shortcut to anything else (say ctrl+alt+[), everything is fine and the system monitor starts.
But nothing happens when I assign it to Ctrl+Alt+Delete.
This is in Ubuntu 14.04 and I now this shortcut worked in previous versions.