Problem : Ctrl+Space does not trigger auto-suggest in Eclipse, on Kubuntu 14.04.
Reason: IBus captures ctrl+space keystroke.
Fix:
1. Right click Ibus Icon from task bar

&
2. From the preferences, remove the option Ctrl+Space as the short cut for next command. (Or simply quit this program every time you boot up)

Sreekumar (KJ) has been a hobby programmer from school days. Codemarvels is his personal blog from the year 2010, where he writes about technology, philosophy, society and a bit about physics.
He now runs a conversational AI company – DheeYantra – focusing his efforts to help businesses improve operational efficiency using digital employees powered by AI.