In order to print correctly, I have to print firs in cups-pdf (sudo apt-get install cups-pdf), open with document viewer the created pdf file and printing it in the real printer. Doing this there are no black squares in my printing job, but it takes too much time.
In order to print correctly, I have to print firs in cups-pdf (sudo apt-get install cups-pdf), open with document viewer the created pdf file and printing it in the real printer. Doing this there are no black squares in my printing job, but it takes too much time.