AMD GPU driver on linux 66% fps increase

--One mainline mesa experimental open source radeon gpu out performs 66.5% better than two windows 10 (AMD driver final) crossfire radeon gpu's

Installation and usage Instructions

Found here https://github.com/jjaxse2017/Mainline-Mesa-Expermental

Estimated time to do this is about 15 minutes and the reason it works is because of the updated c standards c++17 as well as O3 optimization flag passed into the llvm compiler for the amd drivers. In terms of system stability the stack protector option was added to llvm which is not done on the stock releases.

1. (this may be optional as ubuntu updates libexpat versions) Download https://github.com/jjaxse2017/scorched-earth-3d/releases/download/x86_64_gcc_7/libexpat.zip
Download https://github.com/jjaxse2017/scorched-earth-3d/releases/download/x86_64_gcc_7/testmesa_x32_x64.zip

2.) Extract those files

3.) Run a terminal by pressing ctrl + alt + t

4.) Copy and paste this command into the terminal (do not run yet)

export LIBGL_DRIVERS_PATH=/testmesa644:/testmesa322 && export LD_LIBRARY_PATH=/testmesa644:/testmesa322:/usr/local/lib/libexpat64:/usr/local/lib/libexpat32 && export EGL_DRIVERS_PATH=/testmesa644:/testmesa322 && DRI_PRIME=0 MESA_GL_VERSION_OVERRIDE=4.5COMPAT steam %u&

4.) Take note of the possiblity of needing the latest gcc 7/ libdrm as stated below then. Exit steam (ubuntu 17.10 should have those in synaptic)

5.) Save the command in a text file and then hit enter in the terminal to run the command steam

Enjoy the 66% increase in frame rates/higher quality settings I sure am!!

*special note if it says that gcc7 or other libs are needed, you'll have to install them for older versions of ubuntu*

If you spend more than 5 minutes here, you're doing something wrong.

Use synaptic to find updated libs/libdrm versions etc.

sudo add-apt-repository ppa:oibaf/graphics-drivers
sudo apt-get update


Use synaptic to find libdrm etc.

sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update

Click the upper right hand corner button that is normally used to turn the computer off in ubuntu and click system settings -> software & updates -> other software) to turn off the newly added repositories so that nothing expermental installs