this is an old bug. Is this still an issue?

pyrit works OK on my turks as well as carrizo+iceland:
#2: 'OpenCL-Device 'AMD TURKS (DRM 2.48.0 / 4.9.12-200.fc25.x86_64, LLVM
5.0.0)'': 10480.1 PMKs/s (RTT 2.3)

#1: 'OpenCL-Device 'AMD CARRIZO (DRM 3.1.0 / 4.4.0-ROC, LLVM 4.0.0)'': 16205.3
PMKs/s (RTT 1.6)
#2: 'OpenCL-Device 'AMD ICELAND (DRM 3.1.0 / 4.4.0-ROC, LLVM 4.0.0)'': 2072.7
PMKs/s (RTT 1.5)

bfgminer works as well:
OCL0        | 20s:106.8 avg:79.71 u:23.09 Mh/s | A:1 R:0+0(none) HW:0/none

OCL0        | 20s:184.9 avg:182.3 u:75.27 Mh/s | A:2 R:2+0( 50%) HW:0/none
OCL1        | 20s:48.50 avg:47.25 u:37.64 Mh/s | A:1 R:1+0( 50%) HW:0/none

cgminer removed GPU code long time ago