The last thing we do when creating the EYESY OS is to make the root filesystem read only so it doesn’t get corrupted. It looks like we missed checking that these composite video commands work in read only mode. We will get this fixed in next OS update.
In the meantime, you can use the following work around if you need to change composite video setting. You will need to connect a USB keyboard to the EYESY. When it boots up, press the ESC key to exit the video program. Then press Ctrl+Alt+F3 which will bring up a login console. Use ‘music’ for user and pw. Then type the following command to enable write access:
sudo mount -o remount,rw /boot/firmware
Then you can restart the EYESY video program:
sudo systemctl start eyesypy
Now you should be able to change the composite video settings without getting errors.