I have a freshly installed ubuntu 18.04, i also use a samsung M2026w printer (wireless). Diver is Samsung M2020 series.
Problem with printing. Document Viewer don't print pdf. I tried Firefox and it printed once normally, then it gave me an awkward page with little squares having 4 small letters inside each one ,instead of normal letters and symbols, then the next day it printed the same page normally again. I am a math professor and i need to print pdfs every other day. Note that the pdfs contain math and greek language since I am Greek, but i don't think that this is the problem.
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