emacs cut paste

In emacs, when I want to cut/copy and paste (kill and yank) to or from other ap开发者_如何学Goplications, it often does not work if I do that through keyboard shortcuts, but works if I do that by using the mouse and selecting the command under the Edit Menu. Is this a bug, or intended to be like that?

By the way, interestingly, drag-and-dropping into emacs works, but doing out of emacs does not work.

I am using GNU emacs 23.3 under gnome on ubuntu linux 10.04. It was like this from earlier versions of emacs and ubuntu linux.

You should probably read this Emacs Wiki : http://www.emacswiki.org/emacs/CopyAndPaste

I think that the most important is here !

In a nutshell :

(setq x-select-enable-clipboard t)

Yes, indeed x-select-enable-clipboard is indispensable, but even on a barebones emacs, remember that you can always copy and paste by selecting and then mouse-2 (the wheel) and this, all though X. It's surprising how many people ignore this basic X trick.