After Bios Update F16 , My ubuntu can't login * blanck screen ( It's Not detected my Graphics drive

[MICHEAL333]

Hi, I am using dual boot in my system ( Windows & Ubuntu)  I recently upgrade  my BIOS, Now its F16 version, afterward my ubuntu can't boot (Blank screen) ,  This problem occurs by Graphics drivers issues, I can't find any Drivers for Linux, Even though I find and install some AMD drivers from https://www.amd.com/en/support/kb/release-notes/rn-prorad-lin-18-20,

After Installing that driver. My ubuntu can boot in as a normal, But it afterward any of the videos in my PC can't play, Just Hang Automatically, 

I hear Ubuntu 18.04LTS  already come with AMD drivers itself, no need to install, But I can't work in Ubuntu, when I am doing videos and browsing I can see a lot of CPU gets used,  Now I am using my Ubuntu through the Kernal variable  

nomodeset                > It's used to disable Graphics accelaration on booting

                Every Problem starts with the BIOS update,    How can I go back to the Old BIOS stage. 

[WAWood]

@MICHEAL333 

HP only warranties their PCs for usage with the OS that comes preinstalled. IF you replace that or add a different OS, then you assume full responsibility for maintaining that other OS -- as HP then provides assistance only on Redhat and then only to commercial customers.

Your best bet for Linux support, since HP does not provide Linux support to consumers, not does it provide Linux drivers, is to contact the support forum for the Linux distro you are trying to install -- in this case, the Ubuntu Forums: http://ubuntuforums.org/

Folks there have experience using HP machines with Linux and know a lot about driver sources and installation issues.

Good Luck