Recently had to support the printing of various barcodes, initially it printed the barcodes but one or more of the Kubuntu updates broke it after a reboot.  The barcodes looked fine in preview before printing,  but once printed,  well it just has a bunch of numbers instead of the barcode.

Everything looked fine in /usr/share/fonts, my added Type1 and Truetype font directories were there,  to fix it I did the following

1. In /home/username created a new .fonts directory
2. Copied my Type1 and Truetype to  .fonts
3. Ran sudo fc-cache -f -v
4. Ran sudo mkfontdir
5. Ran sudo mkfontscale

This created 2 new files in /home/username/.fonts  fonts.scale and fonts.dir,  if you want the fonts system wide do the above in /usr/share/fonts.