Ubuntu vnc not updating
In this guide, we will be setting up VNC on a Ubuntu 16.04 server and connecting to it securely through an SSH tunnel.
This choice will ensure that our VNC connection will be smooth and stable even on slower internet connections.
Clipboard worked in both directions when connecting to a windows XP computer over RDP.
Did you tested another client to connect to your mac? If not, then its a server issue :) Does clipboard syncing works to other vnc servers?
If you haven't done this yet, you can run through steps 1-4 in the Ubuntu 14.04 initial server setup guide to create this account.
This choice will ensure that our VNC connection will be smooth and stable even on slower Internet connections.
So it sounds like you are exactly right about where the issue lies: some incompatibility with the ARD server and Remmina.
At the same time, ARD certainly appears capable of clipboard operations in both directions when used with mac vnc clients (and Linux -- Mac copy and paste works fine).
By default, most Linux server installations will not come with a graphical desktop environment.
It makes managing files, software, and settings on a remote server easier for users who are not yet comfortable with the command line.