Hi!
Im using ubuntu 16.04.3, AMD GPU Pro 17.40 driver and Radeon 290 card.
Is cclock working with this configuration? I tried 1100 and 1200 setting, but apparently it didnt have any effect.
I can confirm that cclock and other overclocking settings were not working for me 17.40 (RX 580) , reason was that miner was not able to detect ADL library. Are you seeing ADL library missing error on startup ?