Many thanks for your assistance.
I have since invested in a couple of RX 580's and trying to get them to work.
The operating system on that machine, Fedora 27, appears to be too new for these endeavours.
For example, I just tried to install the 15.12, and it gives:
error: Detected X Server version 'XServer 1.19.5_64a' is not supported. Supported versions are X.Org 6.9 or later, up to XServer 1.10 (default:v2:x86_64:lib:XServer 1.19.5_64a:none:4.9.9-200.fc25.x86_64:)
Installation will not proceed.
Whereas the newest driver, the amdpro-gpu 17.50 , is the only AMD driver that will install without problems; and even for that to work, I had to go back to the kernel of February 2017.
For a short while yesterday I got the Claymore miner to work. But after a reboot, it started saying that:
./ethdcrminer64: /lib64/libcurl.so.4: no version information available (required by ./ethdcrminer64)
� Claymore's Dual ETH + DCR/SC/LBC/PASC GPU Miner v10.2 �
ETH: 1 pool is specified
AMD OpenCL platform not found
No NVIDIA CUDA GPUs detected.
No AMD OPENCL or NVIDIA CUDA GPUs found, exit
I have tried most software that AMD offers, including 3 versions of the AMD APP SDK, and about four versions of the display drivers. What I got to work yesterday for a short while, I cannot seem to duplicate again.
Most frustrating.
Regards,
-turgut