My words apply again - stop using those insanely old AMD drivers...
Wolf0, I install Ubuntu 16.04.3 with amdgpu-pro-16.60-379184. In Claymore's 9.1 I have ~440H/s with Pitcairn GPU (Radeon R7 370) and in new Claymore's miner (10.2) I have only 206-207H/s. Is it Pitcairn's bug on new version? HD 7950 woking well in new version, but have a slower H/s.