Comment # 20 on bug 1095700 from Per Jessen

(In reply to Takashi Iwai from comment #19)
> (In reply to Takashi Iwai from comment #18)
> > The powersave option isn't supported on modern drivers, I suppose.
> 
> Or do you mean invocation of the unit file as you tested in the past?
> This won't work, per design.  It's racy with the dynamic VT allocation by
> systemd.

Aha, okay - yes, I was trying to use that.

> Here, the question is whether setterm manual invocation works and is
> effective on the newer kernels.

Directly on the console: 

setterm --blank force - works.
setterm --blank=1 - works.

setterm --powersave on   - no complaints
setterm --powerdown=1    - no complaints, but does not work.