Created attachment 143432 [details]
Logs and various information

This bug may be a duplicate of 109440, kernel versions are different though.

When I log into GDM I get a black screen for few seconds that gets me back to
GDM unless I chose Wayland (which doesn't seem to use amdgpu-pro either
according to lsmod).

AMD driver : amdgpu-pro-18.50-725072-ubuntu-18.04
Kernel version : 4.18.0-15-generic #16~18.04.1-Ubuntu SMP

All information required in
https://amdgpu-install.readthedocs.io/en/latest/install-bugrep.html have been
attached.

I have noticed that the compilation failed (install-log.txt line 1745)
thereforce I have included /var/lib/dkms/amdgpu/18.50-725072/build/make.log
which shows multiple errors.

If you need anything else, please ask.