The way to force output on CVBS is:
echo 1 > /sys/devices/av8100_hdmi.0/hdmisdtvswitch fbset -fb /dev/graphics/fb0 -xres 720 -yres 576 -t 74074 132 12 44 5 0 0
But there's no fbset, so it needs to be sourced and copied to the image.
The way to force output on CVBS is:
echo 1 > /sys/devices/ av8100_ hdmi.0/ hdmisdtvswitch
fbset -fb /dev/graphics/fb0 -xres 720 -yres 576 -t 74074 132 12 44 5 0 0
But there's no fbset, so it needs to be sourced and copied to the image.