Remember to cover the basics, that is, what you expected to happen and
what in fact did happen.  You don't know how to make a good report?  See

     http://orgmode.org/manual/Feedback.html#Feedback

Your bug report will be posted to the Org-mode mailing list.
------------------------------------------------------------------------

I've tried everything, but the consistency graph of habit tasks won't
show up. 

Emacs  : GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.18.9)
 of 2016-04-17 on lgw01-04, modified by Debian
Package: Org-mode version 8.2.10 (release_8.2.10 @ /usr/share/emacs/24.5/lisp/org/)

current state:
==============
(setq
 org-tab-first-hook '(org-hide-block-toggle-maybe
     org-src-native-tab-command-maybe
     org-babel-hide-result-toggle-maybe
     org-babel-header-arg-expand)
 org-speed-command-hook '(org-speed-command-default-hook
 org-babel-speed-command-hook)
 org-occur-hook '(org-first-headline-recenter)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-confirm-shell-link-function 'yes-or-no-p
 org-after-todo-state-change-hook '(org-clock-out-if-current)
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
    org-src-mode-configure-edit-buffer)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-babel-pre-tangle-hook '(save-buffer)
 org-mode-hook '(#[nil "\300\301\302\303\304$\207"
  [org-add-hook change-major-mode-hook org-show-block-all
   append local]
  5]
#[nil "\300\301\302\303\304$\207"
  [org-add-hook change-major-mode-hook
   org-babel-show-result-all append local]
  5]
org-babel-result-hide-spec org-babel-hide-all-hashes)
 org-ctrl-c-ctrl-c-hook '(org-babel-hash-at-point
 org-babel-execute-safely-maybe)
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
 org-cycle-hide-inline-tasks org-cycle-show-empty-lines
 org-optimize-window-after-visibility-change)
 org-modules '(org-bbdb org-bibtex org-docview org-gnus org-habit org-info
      org-irc org-mhe org-rmail org-w3m)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-agenda-files '("~/org/test.org")
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 )