Ubuntu論壇有篇文章說 18.04.2這個版本不支持xrdp，“18.04.2 seems to have broken xrdp”.


按照 Better Fix xRDP issue on Ubuntu 18.04.2 裏面介紹的安裝方法重新安裝了一遍xrdp，成功了！



http://c-nergy.be/blog/?p=13455




1.
Based on the instructions provided, 
you will need to issue the following commands in your Terminal Console 

sudo add-apt-repository ppa:martinx/xrdp-hwe-18.04
sudo apt-get update


When this is done, you can try to install the newly available package by issuing the following command 

2.

sudo apt-get install xrdp xorg



If everything is fine, you should be able to perform a remote connection with no other actions
(even if the first screen ask you to perform some additional actions).





然後才按照上文中的步驟安裝了，安裝完後並不能直接用，還是要根據提示，執行一下

sudo adduser xrdp ssl-cert
sudo reboot



 遠程桌面連接

Windows直接啓動遠程桌面連接（命令 mstsc）