Hello,
I reinstalled the fonts in :

fab@debian:~$ ls -l /home/fab/texmf/fonts/opentype/
total 16
drwxr-xr-x 2 fab fab 4096 août  25 02:14 ebgaramond
drwxr-xr-x 5 fab fab 4096 avril 11  2016 fourier-GUT
drwxrwxr-x 9 fab fab 4096 avril  4  2011 kpfonts
drwxr-xr-x 3 fab fab 4096 août  12 23:50 STIXv2.0.0
fab@debian:~$

 I compiled the following file :

\loadtypescriptfile[mathdesign]
\setupbodyfont[garamond]
\starttext
\input knuth
\stoptext


which font it embedded :

ab@debian:~$ pdffonts layout22.pdf
name                                 type              encoding         emb sub uni object ID
------------------------------------ ----------------- ---------------- --- --- --- ---------
AHYUQI+GaramondNo8-Regular           CID Type 0C       Identity-H       yes yes yes     10  0

It still does not work !

Fabrice

2017-08-18 23:41 GMT+02:00 Fabrice Couvreur <fabrice1.couvreur@gmail.com>:
Hi,
@Aditya

This does not solve my problem

@Pablo

fab@debian:~$ pdffonts layout15.pdf
name                                 type              encoding         emb sub uni object ID
------------------------------------ ----------------- ---------------- --- --- --- ---------
AHYUQI+GaramondNo8-Regular           CID Type 0C       Identity-H       yes yes yes     10  0


2017-08-18 20:17 GMT+02:00 Aditya Mahajan <adityam@umich.edu>:
On Thu, 17 Aug 2017, Fabrice Couvreur wrote:

When I speak of non-readable, I mean it looks like "hieroglyphics".

 Try

mtxrun --script fonts --reload --force

and then compiling again.

Aditya

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