port-macppc: is screenblank supported on macppc?

Subject: is screenblank supported on macppc?
To: None <port-macppc@netbsd.org>
From: Radek Kujawa <streamer@cytrynka.infoland.int.pl>
List: port-macppc
Date: 02/28/2005 21:23:33

Hi.
  I tried running screenblank:

pbook: sudo screenblank
pbook:
(no error printed)

pbook: tail /var/log/messages
(...)
Feb 28 20:57:59 pbook sudo: streamer : TTY=ttyE0 ; PWD=/home/streamer ; USER=root ; COMMAND=/usr/sbin/screenblank
Feb 28 20:57:59 pbook screenblank: Can't set video on `/dev/ttyE0' (Inappropriate ioctl for device)
Feb 28 20:57:59 pbook screenblank: No frame buffer devices, exiting

Machine is PowerBook 3400, running 1.6.2.

Am I doing something wrong, or screenblank is unsupported?

TIA
Radek