I ham running fcitx in 15.04 XFCE Ubuntu (XUbuntu) and my fcitx daemon is working fine for both Chewing and Google Pinyin input, however the menu with pinyin entries never shows up when I type. So for example, I can type some Pinyin, hit a number, and the text is input on the screen, however I have no idea which number corresponds to what entry since the menu doesn't appear. I toyed with some settings to no avail. Am I missing something? Any help is greatly appreciated!
This seems due to the problem of fcitx-ui-qimpanel package. I had the same problem and found that the qt panel for fcitx did not work properly after the system started. After removing this package, everything works well.