Comment 5 for bug 1572874

I was wondering how trusty's plymouth handles the kernel command line, as the "splash" option isn't evaluated in the upstart jobs. It seems this is done in src/main.c, plymouth_should_show_default_splash():

 if (command_line_has_argument (state->kernel_command_line, "splash"))
    {
      ply_trace ("using default splash because kernel command line has option \"splash\"");
      return true;
    }
[...]
  ply_trace ("no default splash because kernel command line lacks \"splash\" or \"rhgb\"");
  return false;

This seems to decide between the default (graphical) splash or the text mode where it shows detailed messages. AFAICS, ubuntu-gnome-default-settings does not fundamentally change this.