##在终端运行:
gconftool --type boolean -s /desktop/ibus/panel/show_icon_on_systray true #显示系统托盘图标
gconftool --type boolean -s /desktop/ibus/panel/show true #显示所有托盘图标
gsettings set com.canonical.Unity.Panel systray-whitelist "['all']" #显示所有托盘图标
重启ibus后台服务(不需要切换到root):
killall ibus-daemon (结束进程)
ibus-daemon -d (重启ibus)