Comment 43 for bug 1178373

(In reply to Eric Koegel from comment #20)
> Created attachment 5541 [details]
> Suspend/hibernate upower 0.99 (no logind)
>
> So this version makes upower optional but still uses the shutdown helper.

A couple of notes:
- OpenBSD supports hibernation via /usr/sbin/ZZZ or /usr/sbin/apm -Z
- on FreeBSD you might want to call /usr/sbin/acpiconf -s 3 for suspend for consistency, /usr/sbin/zzz still supports APM but I doubt there is any APM-supporting hardware left
- on FreeBSD you can check for suspend/hibernate support by looking at the hw.acpi.supported_sleep_state property through the sysctl API, see sysctl(3)[1] and acpi(4)[2]

[1] http://www.freebsd.org/cgi/man.cgi?query=sysctl&sektion=3&apropos=0&manpath=FreeBSD+10.0-stable
[2] http://www.freebsd.org/cgi/man.cgi?query=acpi&apropos=0&sektion=4&manpath=FreeBSD+10.0-stable&arch=default&format=html

Also the long term plan still is to use a DBus-actiavted helper instead of sudo? Where should this live, both xfce4-session and xfce4-power-manager need to make use of it but either one depending on the other would probably not be nice. People run Xfce without xfpm and and xfpm is used outside Xfce.