[texworks] somewhat pixely pdf-preview in ubuntu 20.04

[Isac Hedén]

I recently installed ubuntu 20.04, and I have the impression that the 
pdf-rendering in the pdf-preview in texworks is not as good as it used 
to be in my texworks installation in ubuntu 16.04. Characters seem to 
appear a bit more pixely and less "smooth" than before. I wonder if 
there are any known pdf-rendering issues in ubuntu 20.04 (probably 
related to anti-aliasing or font hinting), and in that case if there are 
some things that can be done to improve the way the texworks pdf-preview 
look (e.g. installing some update of the poppler package or similar).

I have tried to change the Antialiasing and Hinting settings in 
gnome-tweaks but that doesn't seem to have any effect.

Any advice on this would be much appreciated. Thanks in advance!
Isac Hedén

----- configuration info -----
TeXworks version : 0.6.5r.649699a ("launchpad")
Install location : /usr/bin/texworks
Library path     : /home/isac/.TeXworks/
pdfTeX location  : /usr/bin/pdftex
Operating system : Linux isac-XPS-13-9360 5.4.0-42-generic #46-Ubuntu 
SMP Fri Jul 10 00:24:02 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Qt version       : 5.12.5 (build) / 5.12.8 (runtime)
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