Ubuntu 12 輸入中文 及 No Input Window 解決

1.  System->Administration->Language Support
For "Keyboard input system" choose "ibus"

2.  System->Preferneces->Startup Applications
Click on "Add" and fill min dialog box as

Name: iBus
Command: ibus-daemon -drx
Comment: the ibus demon

Now click "Add"

Ref: http://tom87416.blogspot.hk/2010/12/fixing-ibus-input-method-no-input.html

3.  To add / remove input method
Right click the iBus icon -> Preference
Input Method