x86_64:/ $ su
x86_64:/ # cat /proc/fb
0 amdgpudrmfb
x86_64:/ # ls /dev/dri
card0 card1 controlD64 controlD65 renderD128 renderD129
x86_64:/ # ls /sys/class/graphics/fb0/device/drm
card1 controlD65 renderD129
x86_64:/ #