Blender Cycles on Linux does not work with an AMD GPU. Updating either the kernel or ROCm has a 50-50 chance of completely breaking Cycles. By comparison, I had zero issues with Cycles, either CUDA or OptiX, on my 2060. OptiX is also a better denoiser that runs on the GPU, while AMD only has OpenImage that runs on the CPU (GPU support is questionable at this point).