well,

my values are

org-file-apps is a variable defined in `org.el'.
Its value is
((auto-mode . emacs)
 ("\\.x?html?\\'" . default))


which does not help very much since i think is scary to change the auto-mode
in emacs

I have the same annoying problem reported by Jan

2010/3/23 Jan Böcker <jan.boecker@jboecker.de>

> On 23.03.2010 10:17, Leo Alekseyev wrote:
> > When using org mode under windows, links to local PDF files bring up
> > Acrobat.  However, under linux, these links just spawn a new empty
> > buffer in emacs in fundamental mode.  How can I make PDF links bring
> > up evince?...
> >
>
> As far as I know, Org uses the system defaults when it does not know how
> to open a file, and when the system does not know, Org opens the file in
> emacs. Under linux, that system default is the mailcap database, but I
> have no idea how to configure that. (It doesn't even appear to exist on
> my system.)
>
> But we can tell Org directly what to do with PDF files: take a look at
> the variable org-file-apps (M-x customize-variable org-file-apps).
>
> Each entry in this list consists of (selector, action) pairs where the
> action tells Org how to open a file, and the selector (in most cases a
> regular expression matched against the file name) specifies what kind of
> files to open in this way.
>
> Add the following entry:
>
> Extension:      \.pdf\'
> Command:        evince %s
>
> Links to PDF files should now open in evince.
>
>
> If you pull the current git version of Org, you could add a second entry:
>
> Extension:      \.pdf::\([0-9]+\)\'
> Command:        evince %s -p %1
>
> This would allow you to link to a specific page of a PDF like this:
> [[file:/path/to/document.pdf::21]]
> (Shameless plug for a patch of mine that just got accepted.)
>
>
> HTH, Jan
>
>
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