http://blog.csdn.net/majinfei/article/details/52291857
首先找到desktop Sharing. 1. allow the others to view my computer desktop
2. set the password so as to visit.
参考 http://blog.csdn.NET/yasi_xi/article/details/17394667
No matching security types
解决方案:
gsettings set org.gnome.Vino require-encryption false