Bug#507652: texlive: does not print math symbols

[Mojca Miklavec <mojca.miklavec.lists@gmail.com>]

On Sun, Jun 21, 2009 at 11:16, Paul Menzel wrote:
>
> Thanks for this suggestion. The warning messages are indeed gone. But
> the umlauts are not shown unless encoded with \"u. Here are my results
> with your proposed change.
>
> \documentclass{scrartcl}
> \usepackage{lmodern}
> \begin{document}
> Test $\sum$.
>
> Test üöp\"u.
> \end{document}

I'm afraid that \usepackage{lmodern} won't load the OpenType variant
of LM. Check the fontspec manual. Your problem is not a TeX Live bug.
You cannot use non-ascii characters witout loading the proper font in
proper format first (though it might be a nice feature request for
authors of lmodern package to automatically recognize XeTeX and load
the font in proper format).

Mojca