How to display italics with lmodern package [closed]

Question

When I use the lmodern package, I cannot get italics to display. Here is an example:

\listfiles      % added to get in the log the package versions
\documentclass{article}
\usepackage{lmodern}
\begin{document}
non-italic \emph{should be italic} itshape: {\itshape should be italic} 
textit: \textit{should be italic}
\end{document}

None of the "should be italic" are italic. If I remove the lmodern package, all of these are italic. How can I get italic characters with the lmodern package?

I'm compiling with pdflatex (or pdfeTex 3.141592-1.21a-2.2 according to the log).

\listfiles provides:

article.cls    2004/02/16 v1.4f Standard LaTeX document class
size10.clo    2004/02/16 v1.4f Standard LaTeX file (size option)

There are no errors or warnings in the output.