I mentioned in another thread that I had problems with USB Blaster on Quartus 18 on Linux Ubuntu 64, but after update 18.1.0.625 the Linux Ubuntu 64 problem was resolved (dependency on SDK removed). I have not tried Quartus 19 as I would need to move the card and also install Ubuntu (all my other systems are Debian) to see if it works. I'm reluctant to upgrade my 18.1 install simply because it works and 18.1 is what I use.