在盒子上折騰qtmediahub的時候，uxlaunch怎麼都無法正常啓動，查了一下x11的log，發現錯誤如下：
_XSERVTransSocketUNIXCreateListener: ...SocketCreateListener() failed_XSERVTransMakeAllCOTSServerListeners: server already running
Fatal server error:
Cannot establish any listening sockets - Make sure an X server isn't already running
【解決方法】rm -rf /tmp/.X11-unix