Sorry if you saw my edit you'd see this causes trouble with reboots (have to do a hard power down/up via power button). Am mining on zcl suprnova.cc, ubuntu 16.04, this was with bminer 4.0.0.
Did you try
$ sudo systemctl reboot --force
like I mentioned?
https://bitcointalk.org/index.php?topic=2693128No, I didn't. The description of what it does scares me (re: filesystems, etc). Isn't there a possibility of system breakage?