Any news of a fix for this?

As with bug 37364, 'xset dpms force off' clears the display but does not
turn it off.

https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-
video-i810/+bug/37364/

I have to use 'sudo vbetool dpms off' to actually switch off the
backlight.

This is troublesome, because on both Edgy & Feisty at the time of
writing xscreensaver never disables the backlight in accordance with
your power management settings.

I am thus forced to either close the lid or suspend to RAM before going
away for any length of time if I don't want the backlight to carry on
burning.

-- 
Laptop backlight stays always on
https://launchpad.net/bugs/71368

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