I have had the same problem.  Unlike Mark IV Context, LMTX does not seem to recognize fonts outside its tree.  Maybe there's some option to tweak with.

The workaround I found was to copy the TTF files under "{context-lmtx-root}/tex/texmf/fonts/truetype/public/" and run "context --generate".

If you like to have mtxrun font commands to work properly, you need to invoke "mtxrun --script font --reload" after that.

Hope this helps.

On Mon, Aug 26, 2019 at 11:09 AM Floris van Manen <vm@klankschap.nl> wrote:
using the latest context version luametatex on ubuntu 19.4

system          > ConTeXt  ver: 2019.08.24 22:50 MKIV beta  fmt:
2019.8.25  int: english/english
system          > 'cont-new.mkiv' loaded


with the dijkstra.ttf font apparently seen:

$ mtxrun --script fonts --list --all --name dijkstra
identifier        familyname   fontname   filename
                                                  subfont   instances

dijkstra          dijkstra     dijkstra   ~/.local/share/fonts/Unknown
Vendor/TrueType/Dijkstra/Dijkstra_Thin.ttf
dijkstranormal    dijkstra     dijkstra   ~/.local/share/fonts/Unknown
Vendor/TrueType/Dijkstra/Dijkstra_Thin.ttf
dijkstraregular   dijkstra     dijkstra   ~/.local/share/fonts/Unknown
Vendor/TrueType/Dijkstra/Dijkstra_Thin.ttf



context will complain that the font is unknown:

selectfont      > The requested font 'dijkstra' has no files for the
'tf' alternative, Latin Modern is used instead.


I assume i missed a critical step somewhere down the road.
any hints?

thanks
Floris



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