Estou usando o Ubuntu 17.10 e experimentando o congelamento que acredito ser o driver gráfico. Tentei instalar o driver mais recente do site da AMD, mas acabam com essa tela na reinicialização:
Eu já experimentei versões de drivers anteriores com o mesmo resultado.
$ sudo lshw -c video
*-display
description: VGA compatible controller
product: Ellesmere [Radeon RX 470/480]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:22:00.0
version: e7
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=amdgpu latency=0
resources: irq:303 memory:e0000000-efffffff memory:f0000000-f01fffff ioport:e000(size=256) memory:fe800000-fe83ffff memory:c0000-dffff
