Darktable - characters are square

[Jeremiah Cornelius]

Thanks for the input, I'll try that. The only thing that makes me think maybe something's misconfigured with my system is the fact that, when I open a LibreOffice app, the font names do not show up in the list unless I highlight them. Is this normal behaviour for the Pinebook Pro? I have a picture of this issue here: https://cloud.pquirk.com/index.php/s/si6aSQR26SwYXBQ

I had that issue as well in Libreoffice, if you go to tools/options/view and deselect "show preview of fonts" the font list shows up normally...but without preview of course.   There is probably a color setting somewhere that will darken the background of the preview font list....but as usual...I have not looked into it yet (just need to get work done ).  

I think too, like gabeeg seems to confirm, that these are separate issues. Font preview is a mismatch between how OpenOffice wants to render, and the behavior of the chosen theme. Nonetheless, the fonts are there! They render the right shapes when highlighted.

It will help the troubleshooting of the snap, to see thsese as separate issues.

Good luck! I am interested in this outcome.