-
Run
apt-get install compizconfig-settings-manager compiz-plugins-extra, (logout and login again if the following steps failed); -
In Dash (use Win key), input 'compiz', run 'CompizConfig Settings Manager";
-
Click
Window Management, then clickPut; -
In
Put window, checkEnable Put; -
Click the
Disablebutton at the right side ofPut to Next Output(with a keyboard icon), setAlt-Shift-u;
That's it. Now use Alt-Shift-u to move window between screens :)
Ref: http://askubuntu.com/questions/141752/keyboard-shortcut-to-move-windows-between-monitors