I have also this issue, using both dapper and edgy on an hp nx7400 and an Acer 5612wlmi (both with intel 950gma). If I use vbesave dpms off the backlight goes off, with gnome-power-manager, xset dpms force off, the backlighy remains on.
** Attachment added: "xorg.conf" http://librarian.launchpad.net/4932686/xorg.conf -- backlight does not turn off with xset dpms...works with vbetool https://launchpad.net/bugs/37364 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
