I have two Orange PI +2E machines. The first one I got was a while ago so it's running a 3.4.113 kernel (16.04), the more recent one I purchased is running 4.19.13 kernel (18.04) - both are Ubuntu Armbian. I've noticed when I use the "shutdown now" command on the older pi, the board actually powers off but when I use the same command on the newer kernel board, it never powers down. The newer board appears to stop all services and eventually report that the system is halted but it remains in that state. Is there a way to enable it to power off after a "shutdown now" is issued? I'm wondering if this is a kernel difference but it may be something else completely.