I wouldn't downgrade, that's kind of a dead end.
I haven't looked into the details, but I'd patch the manga app to do the refresh itself.
That could be an Intent or some method or an ioctl.
I've done that on B&N Glow (which is totally different as an iMX) as:
Code:
ioctl(fd, MXCFB_SEND_UPDATE, &update);