Comment # 10 on bug 1095700 from Takashi Iwai

(In reply to Stanislav Brabec from comment #9)
> I can confirm that "setterm --blank force" does nothing.

Which graphics driver did you test?  The behavior seems depending on the
driver.
For example, it works for VT with nouveau.  Meanwhile it's been broken for most
of QEMU graphics, AFAIK.  And now testing with an i915 machine, it doesn't seem
working, either.  Hmm.

I remember that I've tried to address some screen blank issues, but the
upstream didn't take it because there were quite rewrites of the code and the
whole DPMS handling was being changed at that time:
  https://marc.info/?l=dri-devel&m=150110261705295&w=2

Maybe we need to revisit the issues again.

In anyway, the broken behavior of setterm --blank, especially if it's really a
regression, should be handled in the upstream bugzilla.  It's clearly an
upstream issue.