今天遇到一個問題，Ubuntu 下鼠標無法點擊了，只有一個箭頭。找了一些資料，發現一個還算方便的方法：
Crtl + Alt + t 打開一個終端，輸入:
metacity --replace
然後會進入到 metacity 下，鼠標是可以點擊的了。然後需要切換回 compiz，使用:
compiz --replace
現在就可以正常使用鼠標點擊了。
- Metacity was the default GTK2 Window Manager for Ubuntu
- Compiz is a compositing manager, which means that it enhances the overall user interaction by adding fancy effects to your windows, from drop shadows to awesome desktop effects like the Desktop Cube or the Expo view