linux-arkmicro/buildroot-external/board/arkmicro/ark1668e_devb/rootfs_overlay/etc/directfbrc

# directfbrc begin
#system=egl
system=fbdev
#mode=1920x720 # display size (change to fit your needs)
depth=32
pixelformat=ARGB
no-vt
vsync-after
no-cursor
no-layers-clear
no-surface-clear
no-sighandler 
#bg-color=00000000
#quiet
#debug
smooth-upscale
smooth-downscale
# directfbrc end