I am using Ubuntu 14.04 and I have been experiencing the following issue with former releases as well.
I am using a German keyboard layout. However, I am missing the key to display the pipe- / inequality-signs (which on German keyboards is supposed to be left to the Y key).
I already tried to add or remove different German keyboard layouts using system settings but non of the layouts include this key. The best I could get so far is to have access to t he following symbols:
«. However, these are not the appropriate German inequality signs plus the pipe symbol is missing.
See this screenshot of my German keyboard layout: