Eclipse Solve Ctrl Space Auto Complete Not Working

I have installed Eclipse Editor in Virtual Machine. But, when I try to use Auto Complete method  by press Ctrl Space keyboard button, that method not working. I dont have this problem in my other installed Eclipse (Windows version and non Virtual Machine Version).

This problem related with the button shortcut (Ctrl Space)  has been used by ibus. We can solve this problem from command prompt. Use below steps to solve this problem :

1. Open Konsole/terminal
2. type : ibus-setup
3. Change existing Keyboard Shortcuts to other (Example : <Control><Shift>space)
4. Close ibus-setup
5. Try again your Eclipse Auto Complete.

This steps solve my problem related with Eclipse Solve Ctrl Space Auto Complete Not Working