Comment # 8 on bug 905424 from Thomas Blume

(In reply to Wolfgang Bauer from comment #7)
> (In reply to Wolfgang Bauer from comment #6)
> > The problem is not really pm-utils, but rather the "suspend" package and
> > that it is used by pm-utils by default, I think.
> 
> I shouldn't have written that here though, as it won't help with the
> original problem anyway. "powersave -U" doesn't work with "suspend"
> uninstalled or SLEEP_MODULE="kernel", even on 13.2.
> 
> Sorry, wrong bug report, I was distracted by the discussion about pm-utils...

Bug 925873 deals with exactly this issue.
You might want to add yourself there.