On Tue, Sep 27, 2022 at 09:38:30AM +0200, pertu...@free.fr wrote: > ... but my feeling is > that this is the symptom of something wrong being done with fonts > selection in the LaTeX output, not an issue with microtype as such.
It is just a consequence of using T1 encoded fonts, which aren't used everywhere in texinfo.tex, only for special characters. In the LaTeX the T1 encoded fonts have to be used everywhere otherwise @DH{} and the like don't work. There's no easy way to use a different font for @DH{} specially without providing our own definitions of these glyph commands. See where \ecfont is used in texinfo.tex. > On my debian I can remove the cm-super package and also the cm-super-minimal package and texi2pdf still works well and produces ogonek accented characters. Do @DH{} and other glyph commands work? In texinfo.tex, a different font is used for ogonek for certain letters only - A, a, E, e. Did you test it with one of those characters?