i hope this can help
compiz (core) - Error: Plugin init failed: scale
compiz (core) - Error: Failed to start plugin: scale
compiz (core) - Info: Unloading plugin: scale
compiz (core) - Info: Loading plugin: unityshell
compiz (core) - Info: Starting plugin: unityshell
compiz (core) - Error: Plugin 'opengl' not loaded.
compiz (core) - Error: Plugin init failed: unityshell
compiz (core) - Error: Failed to start plugin: unityshell
compiz (core) - Info: Unloading plugin: unityshell
Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0
Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0
Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0
Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0
Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0
Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0
Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0
Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0
Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0
Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0