ubuntu folder not created on a disk made by usb-creator

[Brian Murray]

On a usb stick that I created with usb-creator there was no "ubuntu" folder, subsequently update-notifier did not detect this as a volume with packages on it. However, if I dd a .iso file to a partition on my usb stick the "ubuntu" folder, actually a symlink to ., is created.

Here is the relevant checking code from update-notifier:

check_mount_point_for_packages (const char *mount_point, gpointer data)
{
   if (!mount_point)
      return;
   //g_print("checking mount point %s\n", p);

   char *ubuntu_dir = g_strdup_printf("%s/ubuntu",mount_point);
   char *cdromupgrade = g_strdup_printf("%s/cdromupgrade",mount_point);
   char *aptoncd_file = g_strdup_printf("%s/aptoncd.info",mount_point);
   if(! (g_file_test (ubuntu_dir, G_FILE_TEST_IS_SYMLINK) ||
         g_file_test (cdromupgrade, G_FILE_TEST_EXISTS) ||
         g_file_test (aptoncd_file, G_FILE_TEST_IS_REGULAR) )) {
      g_free(ubuntu_dir);
      g_free(cdromupgrade);
      g_free(aptoncd_file);
      return;
   }
   g_free(ubuntu_dir);
   g_free(cdromupgrade);
   g_free(aptoncd_file);

[Dimitri John Ledkov (xnox)]

Ok, but. The packages that are available on the desktop-cd is a very limited set of optional packages we sometimes install.
It's not a full repository that one can upgrade from.
This is expected, since we do not dd the iso to usb stick, but take the bits that are needed to run the live and/or persistent live sessions.

I'm not sure if this is a bug or a feature. E.g. ubiquity when running from such a usb-stick will also be missing those debs.