A few more details after noticing http://www.mail-archive.com/lyx-devel@lists.lyx.org/msg35269.html
Yes, configure in lib get run, but lib/xfonts is an empty directory. In lib/configure.m4 I find #------------------------------ echo "checking for TeX fonts" fontlist="cmex10 cmmi10 cmr10 cmsy10 eufm10 msam10 msbm10" rm -f xfonts/fonts.dir xfonts/fonts.scale xfonts/tmpfonts num=0 for font in $fontlist ; do MSG_CHECKING([for $font]) result=no for ext in pfb pfa ttf ; do if filepath=`kpsewhich $font.$ext` ; then result="yes ($ext)" rm -f xfonts/$font.$ext ln -s $filepath xfonts 2>/dev/null echo "$font.$ext -unknown-$font-medium-r-normal--0-0-0-0-p-0-adobe-fontspe num=`expr $num + 1` break fi done MSG_RESULT($result) done if test ! $num = 0 ; then echo $num >xfonts/fonts.scale cat xfonts/tmpfonts >>xfonts/fonts.scale cp xfonts/fonts.scale xfonts/fonts.dir fi rm -f xfonts/tmpfonts #------------------------------ but my system does not have such X11 fonts (cmex10.pfb, for example), only Tex ones: cmex10.tfm and cmex10.mf (in /usr/share/texmf/fonts) Hope this helps. Marco Morandini