Comment # 13 on bug 1088463 from Petr Gajdos

And I know basically nothing about postscript :).

I think there is at least following behaviour in ImageMagick which does not fit
to what I would expect:

System A
--------
$ rpm -qa | grep 'fonts\|ghostscript'
ghostscript-fonts-std-9.06-10.2.noarch
ghostscript-devel-9.22-2.1.x86_64
ghostscript-9.22-2.1.x86_64
ghostscript-fonts-other-9.06-10.2.noarch
dejavu-fonts-2.37-1.5.noarch
$ convert /home/abuild/rpmbuild/BUILD/ImageMagick-7.0.7-28/images/logo.jpg
-annotate +0+10 'logo' logo-annotated.jpg
$

logo-annotated.jpg seem to be correctly rendered (logo + 'logo' text in it).
convert -list font see ghostscript fonts and dejavu ones.

System B
--------
$ rpm -qa | grep 'fonts\|ghostscript'
dejavu-fonts-2.37-1.5.noarch
ghostscript-9.23-104.1.x86_64
ghostscript-devel-9.23-104.1.x86_64
$ convert /home/abuild/rpmbuild/BUILD/ImageMagick-7.0.7-28/images/logo.jpg
-annotate +0+10 'logo' logo-annotated.jpg
convert: unable to read font `helvetica' @
error/annotate.c/RenderFreetype/1432.
$

convert -list font see dejavu fonts only, I would expect it uses them.