I tried 2 scenarios to install that and both had failed.

#1: ubuntu-16.04.2 server with already installed amdgpu-17.10 (running system).
Attempt to install rocm failed at amdgpu module rebuild stage (version 17.10).
Attempt to boot new kernel resulted in black screen during kernel start at the moment when a video mode should be changed.

#2: ubuntu-16.04.3 desktop (new installation, no yet amdgpu driver - used built-in one).
rocm installation succeeded, after reboot the new kernel is running well.
Attempt to install amdgpu-17.30 failed at module rebuild stage: "headers 4.11 not supported" message, build log contains errors with incompatible argument types of atomic vs struct.
Original amdgpu driver (built-in) mining with the same hash rate as before (2 MH/s lower that it does on Windows).

Any hints from those who has it working: your ubuntu version, amdgpu version (if not built-in), order of installation?