I have a rpi2 running the latest raspbian image with Pixel desktop. I enabled ssh and vnc in raspi config. Rpi is connected to my home network over ethernet and has an IP address. I'm also able to ssh into it from my Linux laptop. However, I cannot connect to the now running vnc server. I'm using Remmina remote desktop client from my Ubuntu laptop.

The error message says something like "connection refused. authentication scheme is not known".

As I understand, after enabling VNC server from the raspi-config GUI, connections from clients should just work. Anyone else seen this? Kindly help.

Thanks and regards,


P.S. I have used RealVNC vnc server on my rpi before (earlier raspbian versions) and it worked just fine.


2 Answers 2


The message indicates that the client and server can not agree on a secure connection mechanism. I have seen this with other VNC viewers. The simplest solution is to download RealVNC Viewer which is available for Windows, Linux, Mac OS X as well as IOS and Android.

  • Thanks Steve, I will try with RealVNC client and see if it solves the problem. If not, I'll install the server on rpi myself too. Commented Dec 23, 2016 at 9:36

Try to access using a browser at the http://ip_address_raspberry:5800

The browser could start a vnc java applet by clicking on applet button.

  • does this still work with the latest feb 2017 release? Commented Mar 1, 2017 at 17:15

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.