Comment 14 for bug 1845362

Hi, I was able to solve the problem using the debugging options of the same gnome-font-viewer package. In my case, I think I started to have a problem after installing the lxqt and xfce desktops, which I believe had different font management daemons from gnome. After uninstalling all the desktops and dependencies for some reason the problem did not disappear. I finally found the solution by looking in the help file for gnome-font-viewer, typing in the terminal:

$ gnome-font-viewer --gdk-debug =

I hope I helped, greetings!