xrdp：window7连接Ubuntu16出现错误

xrdp_mm_process_login_response: login successful for display
started connecting
connecting to 127.0.0.1 5926
tcp connected
security level is 2 (1=none, 2=standard)
password failed
error - problem connecting

修改配置文件：
$sudo vim /etc/xrdp/sesman.ini

在文件最后添加上：
param8=-SecurityTypes
param9=None

重启服务
$sudo service xrdp restart