The Ctrl space does not set mark in Emacs

Question

I installed Ubuntu 14.04 and use fvwm as the windows manager. The Ctrl+space does not set mark in Emacs. It seems that Ctrl+Space does nothing. I use Ctrl+Alt + F2 to go to the console, and Emacs works correctly there. If I use the Ubuntu default windows manager, emacs also works correctly. Does anyone have ideas what could be wrong? Thank you very much.

Solution

I had this same issue and it looks like it's a problem with ibus. From the commandline run: ibus-setup

Under General::Next Input Method you should see <Control>space. Click on the three dots and change it to something else. Hit Apply and close out. ctrl-space should work in Emacs now.

Comments

[bfootdav]

@LesterCheung yep, it is a problem with Ubuntu 14.04 and emacs. (I use KDE for eg.)

[fuenfundachtzig]

General problem affecting many applications, see askubuntu.com/q/243639.

[Brady Trainor]

OMG!, Ubuntu (or whatever is going on) should not override such a basic editing command in Emacs!

[user829755]

@brady-trainor Although ctrl-space is very important for emacs users it is unused by the majority of ubuntu users and having a nice global shortcut for switching language is important, too, at least for non-english users.