Well I wanted to let aBLACKMAN know that the solution I discovered was
to turn acpi off.  It basically disables the ambient light sensor so the
computer is bright all the time.  The Fn ambient control keys also work
with this configuration in Hardy for me.  The way I did this was add
acpi=off to the end of your boot line.  So...

You should find this section in your /boot/grub/menu.lst file:
title           Ubuntu 8.04
root            (hd0,4)
kernel          /boot/vmlinuz-2.6.24-16-generic 
root=UUID=a68069dc-5837-47f8-88fe-ff6d7f8ad8dc ro quiet splash 
initrd          /boot/initrd.img-2.6.24-16-generic
quiet

Then just add acpi=off to the end of the kernel line so that it looks like this:
title           Ubuntu 8.04
root            (hd0,4)
kernel          /boot/vmlinuz-2.6.24-16-generic 
root=UUID=a68069dc-5837-47f8-88fe-ff6d7f8ad8dc ro quiet splash acpi=off
initrd          /boot/initrd.img-2.6.24-16-generic
quiet

Just reboot and the settings should take effect.  The only problem that
I've had with this configuration is when I go to shutdown, the computer
stops on the command line and I have to press the power button again to
shut it off.  I'm not sure if this is the proper way to shut it down,
but I havn't had anything bad happen yet.  The weird thing is the
computer restarts fine with the configuration.

Hope this helps!

** Changed in: hal (Ubuntu)
       Status: Invalid => New

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backlight does opposite of what it's supposed to do
https://bugs.launchpad.net/bugs/199729
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