I am using Ubuntu Gnome 16.04 and have installed ltsp-server-standalone with a amd64 thin client. I am amazed that the Gnome 3 desktop works on a thin client, since I often had problems with newer desktops on LTSP thin clients. (I do use LDM_DIRECTX = True and a GB network to make desktop perform a little better). This being said, there are two authentication issues that prevents Gnome to be a good LTSP solution. Whenever I boot the thin client and log in, I am prompted for an admin password with the message "Authentication required to create a color managed device" and then a little later I get another authentication dialog with the message "Authentication required to update software catalogue". I should mention that I do not have update-manager in my .config/autostart folder and I get this message only from the thin client.
