Comment 2 for bug 1792817

Might have found it! Ran pluma on Ubuntu MATE live (18.04) and it didn't have the problem. So, I straced pluma to see what files were being loaded from my home directory and started methodically renaming things one at a time. Renaming ~/.fonts.conf seems to have done the trick for me. The contents of that file were:

<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
    <dir>/home/REDACTED/.Fontmatrix/Activated</dir>
</fontconfig>

I also renamed ~/.Fontmatrix for good measure.

Did some searching and it seems that fontmatrix was last available back in 14.04. I didn't have it installed anymore, but it seems like something I might have checked out once upon a time.

Anyhow, I hope this can get back to the developers and not silently closed. I saw a few other frustrated pluma users around the web!