System Information
Operating system: Linux-4.18.0-23-generic-x86_64-with-Ubuntu-18.04-bionic 64 Bits
Graphics card: Radeon RX 580 Series (POLARIS10, DRM 3.33.0, 4.18.0-23-generic, LLVM 8.0.0) X.Org 4.5 (Core Profile) Mesa 19.0.8

Blender Version
Broken: version: 2.81 (sub 3), branch: master, commit date: 2019-08-22 03:23, hash: rB0356c8f25b96
Worked: 2.79 (sub 7), branch: blender2.7, commit date: 2019-05-23 08:19, hash: 054dbb833e15,

Short description of error
Cannot render using GPU.

Driver installed is Radeon™ Software for Linux® 19.30 and was installed via

./amdgpu-pro-install --headless --opencl=legacy

Exact steps for others to reproduce the error
Default startup scene; Cycles as Render Engine > Render