People, I have the same problem after having upgraded to Ubuntu 18.04. This is entirely the viewer's issue: Evince, Zathura somehow lost the Symbol font, whereas Mupdf and gv still show everything correctly. So my solution was to switch from the standard Evince to Mupdf.
A potential problem with GROFF/ghostscript is that it DOES NOT embed the Symbol font even with the -P-e option. I wish the developers could check this. Another peculiar font problem with GROFF on Ubuntu 18.04: the unicode U-fonts disappeared from the devpdf folder though they still exist in the GROFF's source code. So, to get back my Cyrillic I had to compile GROFF from the source only to pick the U-fonts and put them back to devpdf. Piotr Piatrou On Mon, 24 Feb 2020 15:21:26 +0100 Marc Chantreux <e...@phear.org> wrote: > hello, > > > The symbol font is one of the base type 1 fonts which all pdf viewers should > > support, so the font is not actually embedded in the pdf. You could try > > adding "- > > P-e" to the groff command. > > Even if Tadziu told us this is the current recommendation (embed > everything), i really can't subscribe: it's 24k more per file. so i'll > keep on trying to fix the readers (and help the others to do so > eventually). > > regards > marc > > -- С уважением, Пётр Петров Piotr Piatrou <p.piat...@dragon.bas-net.by> +375 291656636 Институт Физики, Национальная Академия Наук Беларуси