Bug#403350: xserver-xorg-video-nv: xset dpms force off does not turn off the backlight

[Giuseppe Bilotta <giuseppe.bilotta@gmail.com>]

Package: xserver-xorg-video-nv
Version: 1:1.2.0-3
Severity: important



-- System Information:
Debian Release: 4.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-3-686
Locale: LANG=it_IT.UTF-8, LC_CTYPE=it_IT.UTF-8 (charmap=UTF-8)

Versions of packages xserver-xorg-video-nv depends on:
ii  libc6                        2.3.6.ds1-9 GNU C Library: Shared libraries
ii  xserver-xorg-core            2:1.1.1-12  X.Org X server -- core server

xserver-xorg-video-nv recommends no packages.

-- no debconf information

I have a Dell laptop (Inspiron 8200) with a GeForce2 Go video card and an UXGA monitor (1600x1200).

Putting the monitor into DPMS mode in X (e.g. via xset dpms force on) blanks the monitor, but the backlight remains active. If I 
switch to a plain text console and run vbetool dpms off the backlight is turned off correctly.