Thank you for reading this.
I've run into a beginner problem getting VNC running. It used to run without any problems a few years ago but now I cannot get past this error:
phil@phil-ThinkPad-T420:~$ vncviewer
Connected to RFB server, using protocol version 3.3
No configured security type is supported by 3.3 VNC Viewer
I used to run xtightviewer on my Linux laptop but since that wasn't working I then installed real viewer but that didn't help either.
This is what I used to do:
enter vncserver :1 in raspberry pi terminal
run xtightviewer on the laptop. A tiny dialogue box would then appear asking for the raspberry pi's address which would be 192.168.x.x :1. Once that was accepted then a second dialogue box asked for the password.
I think vnc server now runs on the pi without specifically starting it if enable is set to "yes". I've tried without :1 and I've searched the Internet for any clues. I see than many people have asked a similar question.