I had the same problem using VNC from my Chromebook and after updating to Ubuntu 14.04 LTS. I used the suggestion of the dconf-editor -> org.gnome.desktop.remote-access then "require-encryption = NO"
I had the same problem using VNC from my Chromebook and after updating to Ubuntu 14.04 LTS. I used the suggestion of the dconf-editor -> org.gnome. desktop. remote- access then "require-encryption = NO"