# lsmod | grep -E "radeon|drm|fb"
drm_kms_helper        126976  0
drm                   299008  2 ttm,drm_kms_helper
fb_sys_fops            16384  1 drm_kms_helper
syscopyarea            16384  1 drm_kms_helper
sysfillrect            16384  1 drm_kms_helper
sysimgblt              16384  1 drm_kms_helper