Re: Emacs doesn't set mark with C-<SPC> anymore after Xubuntu upgrade to 14.04

[Robert Thorpe]

Timothée Flutre <timflutre@gmail.com> writes:

> that C-<SPC> was used to set the mark. Same for C-@. And indeed, the latter
> works fine even though the former doesn't.

There are lots of people on the internet complaining about similar
problems.  It could be your terminal, or it could be your window
manager or shell.  Some graphical shells rebind ctrl + space.  On my
system if I use the "Ibus" utility then it claims to remap ctrl + space,
but doesn't actually do it.  And it does something funny with C-z though
it claims to do nothing with that.

Another possibility is the "editable accelerators" in xfce-terminal.
That means if you press a keychord while going through one of it's menus
it will save that keychord as a shortcut to the menu entry.  You may
have accidentally done that.  It can be undone, see the xfce help.

BR,
Robert Thorpe