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I have 2 machines both running Ubuntu 16.04.3 with the Unity desktop environment.

I enabled Desktop Sharing, and disabled Require Encryption. I am able to connect to and use desktop on Machine-A with TightVNC. Machine-B fails with this message:

...target machine actively refused it.

netstat shows vino-server listening on Machine-A. Not listening on Machine-B.

I can enable vino-server by running /usr/lib/vino/vino-server and then successfully connect. I need to do this locally. Command does not work over remote SSH session.

The configuration is the same on both machines. Why does vino-server not start on one of them?

Added /usr/lib/vino/vino-server to Startup Applications, vino-server is now starting when I login locally. I tried this before without success. Possibly I entered the path wrong previously.

However, I would like vino-server to auto start without the need of me logging in locally first.

Rebooted and connected via SSH, ran /usr/lib/vino/vino-server and got: Failed to connect to Mir: Failed to connect to server socket: No such file or directory Unable to init server: Could not connect: Connection refused Cannot open display:

Added /usr/lib/vino/vino-server to rc.local, no change.

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    Does it make any difference if you turn off the firewall with gufw? – heynnema Aug 13 '17 at 23:13
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    I have always had to add vino-server into the autostart list manually. – Organic Marble Aug 14 '17 at 2:51
  • @heynnema - Firewall isn't the problem. vino-server does not start. Once I manually start vino-server I can connect. – Ookla Aug 14 '17 at 13:13
  • @Organic Marble - I tried adding /usr/lib/vino/vino-server to autostart, but no difference. Still needed to start vino-server manually. – Ookla Aug 14 '17 at 13:14
  • In terminal, before manually starting vino-server, do systemctl status and look for any services that failed to start. – heynnema Aug 14 '17 at 14:43
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Could never get vino-server to start on boot, only when I login locally. Installed x11vnc and added systemd script. Able to VNC from Windows 10 using TightVNC to the Ubuntu box after a reboot and no local login. x11vnc presents the Unity desktop, so no need to install any alternative desktop environment.

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