Regressed R9 290 Isn't Affected By Issue When Using AMDGPU DRM Driver

Published earlier today was AMDGPU vs. Radeon DRM benchmarks on DRM-Next for GCN 1.0/1.1 graphics cards that have experimental support available via Kconfig switches to enable this alternative open-source DRM driver over the long-standing Radeon driver. Here are some fresh Git benchmarks using the R9 290 "Hawaii" GPU that's been in a regressed state on the default Radeon driver...