On Sat, Sep 10, 2011 at 5:14 PM, Shiyuan <gshy2014@gmail.com> wrote:
>>(add-to-list 'Info-default-directory-list
>>
>>             >(expand-file-name "/opt/share/info"))
>>
> According to http://www.emacswiki.org/emacs/InfoPath,
> Info-default-directory-list will not be used if INFOPATH is defined but
> Info-directory-list should always be defined and used. But How comes I
> cannot see it?  Thanks.

Then try something like this very early in your init file instead:

(setenv "INFOPATH" "/opt/share/info:$INFOPATH" t)