Issues with Ubuntu 14.04 -
nsgpucnminer: relocation error: /opt/Claymore10/nsgpucnminer: symbol _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC1EPKcRKS3_, version GLIBCXX_3.4.21 not defined in file libstdc++.so.6 with link time reference
nsgpucnminer: relocation error: /opt/Claymore10/nsgpucnminer: symbol _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC1EPKcRKS3_, version GLIBCXX_3.4.21 not defined in file libstdc++.so.6 with link time reference
14.04 is older than Jesus. Try running something made this century.
I have an issues with AMD drivers ( 13.12) on my rig (R9 270 and R7 370 cards) on Ubuntu > 14.04
My words apply again - stop using those insanely old AMD drivers...
Tell AMD to add support for clock control and undervolting in the AMDGPU drivers.
At this point, fglrx is INFINITELY better for R9 and older series cards than their AMDGPU stuff.
Also, tell AMD to SUPPORT THEIR BLOODY APU iGPUs in something newer than fglrx - 2+ years and STILL NO BLEEDING SUPPORT UNDER LINUX FOR APUS on the AMDGPU stack.