diff --git a/emacs.el b/emacs.el
index fe2a1bb..a761385 100644
--- a/emacs.el
+++ b/emacs.el
@@ -280,9 +280,9 @@ found, otherwise returns nil."
            system-name
            (abbreviate-file-name default-directory)))
 
-(run-with-idle-timer 3
-                     t
-                     'my-message-current-info)
+;; (run-with-idle-timer 3
+;;                      t
+;;                      'my-message-current-info)
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; minibuffer
@@ -653,6 +653,17 @@ found, otherwise returns nil."
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; some modes and hooks
 
+;; todo: reg major mode when set explicitly
+
+;; Detect file type from shebang and set major-mode.
+(add-to-list 'interpreter-mode-alist
+             '("python3" . python-mode))
+(add-to-list 'interpreter-mode-alist
+             '("python2" . python-mode))
+
+;; (add-hook default-majorg-mode
+;;           'my-detect-major-mode-from-shebang)
+
 ;; http://fukuyama.co/foreign-regexp
 '(and (fetch-library
        "https://raw.github.com/k-talo/foreign-regexp.el/master/foreign-regexp.el"