Comment 11 for bug 1437726

The solution posted by https://launchpad.net/~suv-lp does not entirely works, as for objects created and rotated including a fill patter, the filter won't be applied correctly, this is a couple of reported bugs: Bug #1414214 and Bug #806028.

However a valid solution is making the image really big (hit Ctrl+D and set a custom size), the size that worked for me was 40 times horizontally bigger and 40 times vertically bigger. After saving the file as a pdf, you can use a cropping tool to resize it.

It is advisable to use 'pdfcrop' from the package 'texlive-extra-utils', just enter the command 'pdfcrop file.pdf' and it will provide a file 'file-crop.pdf'. This is in case you want to resize the file to the content (no margins), in case you want margins, please read the help on this package (enter 'pdfcrop --help' in the terminal).

This was confirmed by using Kubuntu 16.04.