We use a battery and acpid to shutdown the board on power fail. When power is removed the battery holds up the board for an orderly shutdown then after a predetermined time we remove battery power and wait for power to be reapplied.
on the old kernels everything works great root@beaglebone:~# uname -r 4.4.12-ti-r31 on boot we have this in syslog related to acpid Feb 25 19:19:29 beaglebone acpid: starting up with netlink and the input layer blah blah blah more infos not related to acpid Feb 25 19:19:29 beaglebone acpid: 1 rule loaded Feb 25 19:19:29 beaglebone acpid: waiting for events: event logging is off in var/log/messages the last line during power fail is Feb 25 19:19:26 beaglebone rsyslogd: [origin software="rsyslogd" swVersion="8.4.2" x-pid="359" x-info="http://www.rsyslog.com";] exiting on signal 15. same line in syslog then the board shuts down we wait our time and remove battery power. On the new kernel using systemd, acpid does not generate the shutdown event and we just sit there till battery is removed 4.14.20-ti-r36 i noticed this on 4.9 too root@beaglebone:/home/debian# systemctl list-unit-files | grep enabled acpid.path enabled further down the list acpid.socket enabled root@beaglebone:/home/debian# systemctl list-units --type=service --state=running acpid.service loaded active running ACPI event daemon Power button powers down the board as expected. remove acpid, power button still powers down board reinstalling acpid power button works as expected but power fail still does not shutdown system It seems on newer systems with systemd acpid does nothing how can we tell system to shutdown on a power fail ? -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/6ca8f8be-b8be-5055-e97d-bc97d90e037b%40gmail.com. For more options, visit https://groups.google.com/d/optout.
