dsmetest cannot do this in OS<2008. You need modified kernel. See http://www.internettablettalk.com/fo...990#post138990 The fine grained control in dsme (and dsmetest) was done for supporting N810 light sensor, previous versions have only few hardcoded levels and workaround is needed in kernel. http://fanoush.wz.cz/maemo/#backlight Still, some previous version of this applet worked with such modified kernel, not sure if the current one still does and/or is available for OS2007.