I tried to fix the issue installing the latest kernel "4.18.3 - 4.18.5" but the issue persists.
I still have issues (blurry options).
Can I install this driver for my Ubuntu 18.04.1? AMDGPU-Pro Driver Version 16.40 for Ubuntu 16.04
I not sure if this will help or not. How to install AMDPRO drivers in Ubuntu 18.04:https://linuxconfig.org/how-to-install-the-latest-amd-radeon-drivers-on-ubuntu-18-04-bionic-beaver-linux
This might be more helpful: AMDGPU-Driver - Community Help Wiki
This website has an untrusted PPA that allows you to install AMD Catalyst Graphics driver in 18.04: AMD Catalyst Graphics Driver for Ubuntu 18.04 LTS (Bionic Beaver... : “DoKomiX” team
I tried with your recommendation and the issue persists.
I think that I am gonna wait for new release.
Thanks for your help, cya!