I have libsmbios installed and it still does not work. The problem is not libsmbios, but the fact that Ubuntu uses an older version of HAL that does not take into account libsmbios at all. I had asked to backport the HAL changes to support DELL laptops (if they didn't want to upgrade the whole HAL package), but no one at Canonical did anything about it. In fact, they even misread my bug report and they just replied "brightness works", while I was talking about the Gnome APPLET of Brightness and not the hardware buttons of any laptop for brightness.
I have libsmbios installed and it still does not work. The problem is not libsmbios, but the fact that Ubuntu uses an older version of HAL that does not take into account libsmbios at all. I had asked to backport the HAL changes to support DELL laptops (if they didn't want to upgrade the whole HAL package), but no one at Canonical did anything about it. In fact, they even misread my bug report and they just replied "brightness works", while I was talking about the Gnome APPLET of Brightness and not the hardware buttons of any laptop for brightness.