After the Ubuntu 13.04 system is updated, the status bar disappears.

After the Ubuntu 13.04 system is updated, the status bar disappears. After the recommended updates are installed on the system today, only the desktop and icons are displayed, and the START column and top status bar on the left disappear ...... Baidu's attempt to copy and paste a number of results is invalid, and it is finally a disaster caused by compiz updates. first open Ctrl + Alt + T open Terminal, install the ccsmTerminal code sudo apt-get install compizconfig-settings-manager 2. enter ccsm in Terminal to enable compiz's setting option 3. in [Effects], select [Window Decoration] 4. select all 5 in [Window Management. in [Desktop], select [Ubuntu Unity Plugin] and [Enable Ubuntu Unity Plugin]. Then there will be a series of conflicts.