Comment 32 for bug 41994

I've been having the same trouble with Hardy. I have a HP Compaq nc6000 and use the fglrx drivers.

My solution is two-fold:
1) change the gnome-power-manager settings so that "nothing" is done on a lid closure. This fixes the issue with mouse movements turning on the display (or anything, really - maybe not useful for a laptop connected to external monitor).
2) At this point, the backlight is shut off, but there is still an image displayed on the screen (as can be seen in bright light). The "radeontool" must be used to turn off the screen. I modified the above lid.sh.pre script (after giving executable permission! That cause me lots of frustration!) by copying the two lines in lid.sh that turn on and off the light using radeontool to the respective places in lid.sh.pre

This is a quick hack (as most of this thread is about, but it make me happy!)