https://bugs.freedesktop.org/show_bug.cgi?id=64201
--- Comment #56 from Jan Vesely jan.vesely@rutgers.edu --- 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