Comment by anthk

CUDA. Non-free firmware. Still bad. And Radeon the same, propietary firmware run by the kernel is needed sometimes to even boot the GPU, it just happens Linux-Libre patches it and the Modesetting driver will work fine until you call 3D accelerated calls, when that happens the system may either panic or crash X entirely. That can be fixed by setting RenderAccel to none in the X.org config file.