Using 'locate' to find polaris10_mc.bin results in the following: ~> locate polaris10_mc.bin /lib/firmware/5.3.18-lp152.36-default/amdgpu/polaris10_mc.bin /lib/firmware/amdgpu/polaris10_mc.bin /usr/src/amdgpu-5.6.5.24-1109584/firmware/amdgpu/polaris10_mc.bin ?so maybe it is the fault of amdgpu-pro for not creating/copying the relevant firmware file into /lib/firmware/5.3.18-lp152.44-default?