it seems that the switchable graphics feature (--px installation option) is still broken.
Trying to install amdgpu-pro-18.40-676022 on Ubuntu 18.04 results in an
"unable to find xserver modesetting package" error.
This renders a system with a switchable amd internal / amd discrete graphics setup unusable with the amdpu-pro drivers.
The error has existed in the whole series of amdgpu-pro linux 18.x drivers for ubuntu 18.04.
Does anyone know how to get through to amd with this so that they put in the missing package?