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I was using VNC from RealVNC to access my Raspberry Pi 3B. However, the session suddenly stopped, and I get the following error message:

License Issue

However, according to the RealVNC website, I should have a free license for noncommercial use. How do I fix this issue?

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  • Any particular reason you're not using x11vnc? – bye Feb 16 '17 at 10:40
  • @DrEval RealVNC Server comes bundled with Raspbian, and it's much faster and more usable than x11vnc – scruss Feb 21 '17 at 23:09
  • @DrEval Also, you have the ability to cloud connect which you can do outside your local network – Human Feb 22 '17 at 1:13
  • @scruss I struggled to get RealVNC to let me connect to the existing session; I wanted to control the current screen, not a new one. – bye Feb 22 '17 at 10:31
  • maybe best to ask your own question if this problem persists @DrEval. I installed it with apt, and it's given me access to my main session from the start. – scruss Feb 22 '17 at 19:03
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A new version of RealVNC Server was made available in the repositories yesterday. If you have recently updated your packages and installed this new version, then you will need to restart any running VNC server instances.

It's probably easiest to simply reboot if you can, but if not you can restart the servers.

If you're using the service mode server (i.e. the one that lets you connect to the console session), do:

sudo systemctl restart vncserver-x11-serviced

For virtual mode servers (started via the "vncserver" command), you will need to shutdown the virtual session and restart it. Do:

vncserver -kill DISPLAY

Where DISPLAY is the display number (probably :1 if you have only one virtual mode server running).

and restart the server as normal with the "vncserver" command.

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1

I had no end of trouble with RealVNC. It was all fully licenced (personal), updated, and correctly install but PAM Unix login always failed leading to blacklisting. VNC password authentication worked but I ended up with a postage stamp sized screen. Disable with

systemctl disable vncserver-x11-serviced

and install TightVNCserver as above and use any VNC viewer and it just works. I'm sure with an Enterprise service-level agreement it would be wonderful but it shouldn't have been used for the Raspberry Pi.

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  • This page might be of some help: realvnc.com/en/connect/docs/raspberry-pi.html You can set the screen resolution from the Raspberry Pi configuration app, the default is very low if you don't have a HDMI monitor connected since this is the resolution used by the composite TV output. – Andrew Wedgbury Mar 30 '18 at 8:28
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I got stuck with the same problem on a Pi 2 running Jessie.

What finally worked for me is: 

sudo apt-get install tightvncserver.

It cannot un-install realVNC, but disables it partly. After that I can use vncserver as normal:

-geometry 1920x1080 i.s.o. -randr=1920x1080)
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