These are the settings I had to change in the config file to get Chrome Remote Desktop working on my Ubuntu 18.04 server. Thanks to this site: https://superuser.com/questions/778028/configuring-chrome-remote-desktop-with-ubuntu-gnome-14-04

  1. Make a backup and then edit /opt/google/chrome-remote-desktop/chrome-remote-desktop
  2. Add screen size(s if multiples) to DEFAULT_SIZES to look like this:
    DEFAULT_SIZES = “1920×1080,3840×2160”
  3. Changed display number to 0:
    FIRST_X_DISPLAY_NUMBER = 0
  4. Comment out this section:
    #while os.path.exists(X_LOCK_FILE_TEMPLATE % display):
    #display += 1
  5. In this section, comment out self._launch_x_server(x_args) and self._launch_x_session() (shown below) and then add this:

    display = self.get_unused_display_number()
    self.child_env[“DISPLAY”] = “:%d” % display

    so that it looks like this:

    def launch_session(self, x_args):
    self._init_child_env()
    self._setup_pulseaudio()
    self._setup_gnubby()
    #self._launch_x_server(x_args)
    #self._launch_x_session()
    display = self.get_unused_display_number()
    self.child_env[“DISPLAY”] = “:%d” % display
  6. Save and exit, then stop and start the Chrome Remote Desktop service from the command line:
    sudo service chrome-remote-desktop stop
    sudo service chrome-remote-desktop start