Disable ibus in Ubuntu 14.04

I regularly switch between 3 scripts (English/Roman, Kannada and Hindi/Sanskrit/Devanagari).

In 12.04, I used to enable IBus by typing Ctrl+Space to switch from English to Kannada, and again the same key to switch back to English. If I wanted to move to the next input method, I used to press Alt+Left Shift.

Now I have upgraded to 14.04. Here I see the option to move to the next and previous input method. However, I don't see any option to disable the input method completely and use the default (English) script.

So, If I have to switch from English to Kannada, I have to press Ctrl+Space, and then from Kannada to English, I have to either press Ctrl+Space twice, or Ctrl+Shift+Space

Is there any way to just enable/disable the IBus input just like it was in 12.04?

Go to Language Support and Locate Keyboard input Method System and change it from Ibus to None.