According to discussion on the apcupsd-users mailing list [1] this issue is OS-specific rather than being a problem in upstream apcupsd.
Specifically it is believed that this issue is due to Ubuntu shutting down USB before the killpower command is issued to the UPS, which which it is no longer possible to communicate without USB.
According to discussion on the apcupsd-users mailing list [1] this issue is OS-specific rather than being a problem in upstream apcupsd.
Specifically it is believed that this issue is due to Ubuntu shutting down USB before the killpower command is issued to the UPS, which which it is no longer possible to communicate without USB.
[1]: https:/ /marc.info/ ?t=147606479000 001&r=1& w=2