Somehow on my new X230t Lenovo Thinkpad, Ubuntu 13.10 only lets me have the following options as the compose key:
Right Alt, Right Ctrl, Left Alt, Right Win, Menu, Caps Lock
I really don't care for Unity's functions using Super. I would like to set this as my compose key. Is there any way to manage this?
UPDATE: This solution had been working like a charm for me, until today when Ubuntu did a fateful update. I looked at the d-conf editor for the entry below. It still shows compose:lwin
as an option. But Left Window is no longer available as an option in the keyboard settings. Any suggestions? (I am using Ubuntu 14.04 now)