I just upgraded to a RX580 and cannot use drivers newer than 18.3.1 (the ones that came on the installation CD). If I install drivers newer than that, after installation and rebooting the system, once Windows loads to the login screen I've lost all USB ports and network adapters. Therefore, I cannot use keyboard\mouse (Logitech MK700) and get to the desktop. I know the network isn't working because it shows the disconnected icon in the bottom-right, with the system working it'll connect while at the login screen. Windows is NOT frozen at this point - the clock changes if I leave it at this screen. If I turn off my login password it will load the desktop as expected, but still no input devices or network are working.
This is happening with a fresh install of Windows 10 64-bit. I've tried many troubleshooting steps and everything is a dead end. Troubleshooting is a slow process as the only way to recover from the problem is to restore from a system image or reinstall Windows (System Restore has been unreliable). The keyboard works in BIOS and both keyboard & mouse work in the recovery environment. The issue persists in Safe Mode and happens no matter how I install the newer drivers (clean install, network on\off, etc.).
Have tried updating all possible drivers (chipset, audio, monitor, mouse & keyboard, USB controllers, network adapters) and made sure Windows is up-to-date.
It seems like the AMD drivers post March 2018 are creating some sort of conflict with other drivers after the install + reboot. It does not seem to be a hardware problem since everything is working fine with 18.3.1. I do see the USB, Network, and Sound devices sharing IRQ 16-17 but am not convinced that's an actual problem. The GPU is using an odd IRQ, 4294967294, but is that normal?